---
_id: '559'
abstract:
- lang: eng
text: 'Proofs of space (PoS) were suggested as more ecological and economical alternative
to proofs of work, which are currently used in blockchain designs like Bitcoin.
The existing PoS are based on rather sophisticated graph pebbling lower bounds.
Much simpler and in several aspects more efficient schemes based on inverting
random functions have been suggested, but they don’t give meaningful security
guarantees due to existing time-memory trade-offs. In particular, Hellman showed
that any permutation over a domain of size N can be inverted in time T by an algorithm
that is given S bits of auxiliary information whenever (Formula presented). For
functions Hellman gives a weaker attack with S2· T≈ N2 (e.g., S= T≈ N2/3). To
prove lower bounds, one considers an adversary who has access to an oracle f:
[ N] → [N] and can make T oracle queries. The best known lower bound is S· T∈
Ω(N) and holds for random functions and permutations. We construct functions that
provably require more time and/or space to invert. Specifically, for any constant
k we construct a function [N] → [N] that cannot be inverted unless Sk· T∈ Ω(Nk)
(in particular, S= T≈ (Formula presented). Our construction does not contradict
Hellman’s time-memory trade-off, because it cannot be efficiently evaluated in
forward direction. However, its entire function table can be computed in time
quasilinear in N, which is sufficient for the PoS application. Our simplest construction
is built from a random function oracle g: [N] × [N] → [ N] and a random permutation
oracle f: [N] → N] and is defined as h(x) = g(x, x′) where f(x) = π(f(x′)) with
π being any involution without a fixed point, e.g. flipping all the bits. For
this function we prove that any adversary who gets S bits of auxiliary information,
makes at most T oracle queries, and inverts h on an ϵ fraction of outputs must
satisfy S2· T∈ Ω(ϵ2N2).'
alternative_title:
- LNCS
author:
- first_name: Hamza M
full_name: Abusalah, Hamza M
id: 40297222-F248-11E8-B48F-1D18A9856A87
last_name: Abusalah
- first_name: Joel F
full_name: Alwen, Joel F
id: 2A8DFA8C-F248-11E8-B48F-1D18A9856A87
last_name: Alwen
- first_name: Bram
full_name: Cohen, Bram
last_name: Cohen
- first_name: Danylo
full_name: Khilko, Danylo
last_name: Khilko
- first_name: Krzysztof Z
full_name: Pietrzak, Krzysztof Z
id: 3E04A7AA-F248-11E8-B48F-1D18A9856A87
last_name: Pietrzak
orcid: 0000-0002-9139-1654
- first_name: Leonid
full_name: Reyzin, Leonid
last_name: Reyzin
citation:
ama: 'Abusalah HM, Alwen JF, Cohen B, Khilko D, Pietrzak KZ, Reyzin L. Beyond Hellman’s
time-memory trade-offs with applications to proofs of space. In: Vol 10625. Springer;
2017:357-379. doi:10.1007/978-3-319-70697-9_13'
apa: 'Abusalah, H. M., Alwen, J. F., Cohen, B., Khilko, D., Pietrzak, K. Z., &
Reyzin, L. (2017). Beyond Hellman’s time-memory trade-offs with applications to
proofs of space (Vol. 10625, pp. 357–379). Presented at the ASIACRYPT: Theory
and Applications of Cryptology and Information Security, Hong Kong, China: Springer.
https://doi.org/10.1007/978-3-319-70697-9_13'
chicago: Abusalah, Hamza M, Joel F Alwen, Bram Cohen, Danylo Khilko, Krzysztof Z
Pietrzak, and Leonid Reyzin. “Beyond Hellman’s Time-Memory Trade-Offs with Applications
to Proofs of Space,” 10625:357–79. Springer, 2017. https://doi.org/10.1007/978-3-319-70697-9_13.
ieee: 'H. M. Abusalah, J. F. Alwen, B. Cohen, D. Khilko, K. Z. Pietrzak, and L.
Reyzin, “Beyond Hellman’s time-memory trade-offs with applications to proofs of
space,” presented at the ASIACRYPT: Theory and Applications of Cryptology and
Information Security, Hong Kong, China, 2017, vol. 10625, pp. 357–379.'
ista: 'Abusalah HM, Alwen JF, Cohen B, Khilko D, Pietrzak KZ, Reyzin L. 2017. Beyond
Hellman’s time-memory trade-offs with applications to proofs of space. ASIACRYPT:
Theory and Applications of Cryptology and Information Security, LNCS, vol. 10625,
357–379.'
mla: Abusalah, Hamza M., et al. Beyond Hellman’s Time-Memory Trade-Offs with
Applications to Proofs of Space. Vol. 10625, Springer, 2017, pp. 357–79, doi:10.1007/978-3-319-70697-9_13.
short: H.M. Abusalah, J.F. Alwen, B. Cohen, D. Khilko, K.Z. Pietrzak, L. Reyzin,
in:, Springer, 2017, pp. 357–379.
conference:
end_date: 2017-12-07
location: Hong Kong, China
name: 'ASIACRYPT: Theory and Applications of Cryptology and Information Security'
start_date: 2017-12-03
date_created: 2018-12-11T11:47:10Z
date_published: 2017-11-18T00:00:00Z
date_updated: 2023-09-07T12:30:22Z
day: '18'
department:
- _id: KrPi
doi: 10.1007/978-3-319-70697-9_13
ec_funded: 1
intvolume: ' 10625'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://eprint.iacr.org/2017/893.pdf
month: '11'
oa: 1
oa_version: Submitted Version
page: 357 - 379
project:
- _id: 258AA5B2-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '682815'
name: Teaching Old Crypto New Tricks
publication_identifier:
isbn:
- 978-331970696-2
publication_status: published
publisher: Springer
publist_id: '7257'
quality_controlled: '1'
related_material:
record:
- id: '83'
relation: dissertation_contains
status: public
scopus_import: 1
status: public
title: Beyond Hellman’s time-memory trade-offs with applications to proofs of space
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 10625
year: '2017'
...
---
_id: '550'
abstract:
- lang: eng
text: For large random matrices X with independent, centered entries but not necessarily
identical variances, the eigenvalue density of XX* is well-approximated by a deterministic
measure on ℝ. We show that the density of this measure has only square and cubic-root
singularities away from zero. We also extend the bulk local law in [5] to the
vicinity of these singularities.
article_number: '63'
author:
- first_name: Johannes
full_name: Alt, Johannes
id: 36D3D8B6-F248-11E8-B48F-1D18A9856A87
last_name: Alt
citation:
ama: Alt J. Singularities of the density of states of random Gram matrices. Electronic
Communications in Probability. 2017;22. doi:10.1214/17-ECP97
apa: Alt, J. (2017). Singularities of the density of states of random Gram matrices.
Electronic Communications in Probability. Institute of Mathematical Statistics.
https://doi.org/10.1214/17-ECP97
chicago: Alt, Johannes. “Singularities of the Density of States of Random Gram Matrices.”
Electronic Communications in Probability. Institute of Mathematical Statistics,
2017. https://doi.org/10.1214/17-ECP97.
ieee: J. Alt, “Singularities of the density of states of random Gram matrices,”
Electronic Communications in Probability, vol. 22. Institute of Mathematical
Statistics, 2017.
ista: Alt J. 2017. Singularities of the density of states of random Gram matrices.
Electronic Communications in Probability. 22, 63.
mla: Alt, Johannes. “Singularities of the Density of States of Random Gram Matrices.”
Electronic Communications in Probability, vol. 22, 63, Institute of Mathematical
Statistics, 2017, doi:10.1214/17-ECP97.
short: J. Alt, Electronic Communications in Probability 22 (2017).
date_created: 2018-12-11T11:47:07Z
date_published: 2017-11-21T00:00:00Z
date_updated: 2023-09-07T12:38:08Z
day: '21'
ddc:
- '539'
department:
- _id: LaEr
doi: 10.1214/17-ECP97
ec_funded: 1
file:
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checksum: 0ec05303a0de190de145654237984c79
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:08:04Z
date_updated: 2020-07-14T12:47:00Z
file_id: '4663'
file_name: IST-2018-926-v1+1_euclid.ecp.1511233247.pdf
file_size: 470876
relation: main_file
file_date_updated: 2020-07-14T12:47:00Z
has_accepted_license: '1'
intvolume: ' 22'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
project:
- _id: 258DCDE6-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '338804'
name: Random matrices, universality and disordered quantum systems
publication: Electronic Communications in Probability
publication_identifier:
issn:
- 1083589X
publication_status: published
publisher: Institute of Mathematical Statistics
publist_id: '7265'
pubrep_id: '926'
quality_controlled: '1'
related_material:
record:
- id: '149'
relation: dissertation_contains
status: public
scopus_import: 1
status: public
title: Singularities of the density of states of random Gram matrices
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 22
year: '2017'
...
---
_id: '647'
abstract:
- lang: eng
text: Despite researchers’ efforts in the last couple of decades, reachability analysis
is still a challenging problem even for linear hybrid systems. Among the existing
approaches, the most practical ones are mainly based on bounded-time reachable
set over-approximations. For the purpose of unbounded-time analysis, one important
strategy is to abstract the original system and find an invariant for the abstraction.
In this paper, we propose an approach to constructing a new kind of abstraction
called conic abstraction for affine hybrid systems, and to computing reachable
sets based on this abstraction. The essential feature of a conic abstraction is
that it partitions the state space of a system into a set of convex polyhedral
cones which is derived from a uniform conic partition of the derivative space.
Such a set of polyhedral cones is able to cut all trajectories of the system into
almost straight segments so that every segment of a reach pipe in a polyhedral
cone tends to be straight as well, and hence can be over-approximated tightly
by polyhedra using similar techniques as HyTech or PHAVer. In particular, for
diagonalizable affine systems, our approach can guarantee to find an invariant
for unbounded reachable sets, which is beyond the capability of bounded-time reachability
analysis tools. We implemented the approach in a tool and experiments on benchmarks
show that our approach is more powerful than SpaceEx and PHAVer in dealing with
diagonalizable systems.
alternative_title:
- LNCS
author:
- first_name: Sergiy
full_name: Bogomolov, Sergiy
id: 369D9A44-F248-11E8-B48F-1D18A9856A87
last_name: Bogomolov
orcid: 0000-0002-0686-0365
- first_name: Mirco
full_name: Giacobbe, Mirco
id: 3444EA5E-F248-11E8-B48F-1D18A9856A87
last_name: Giacobbe
orcid: 0000-0001-8180-0904
- first_name: Thomas A
full_name: Henzinger, Thomas A
id: 40876CD8-F248-11E8-B48F-1D18A9856A87
last_name: Henzinger
orcid: 0000−0002−2985−7724
- first_name: Hui
full_name: Kong, Hui
id: 3BDE25AA-F248-11E8-B48F-1D18A9856A87
last_name: Kong
orcid: 0000-0002-3066-6941
citation:
ama: 'Bogomolov S, Giacobbe M, Henzinger TA, Kong H. Conic abstractions for hybrid
systems. In: Vol 10419. Springer; 2017:116-132. doi:10.1007/978-3-319-65765-3_7'
apa: 'Bogomolov, S., Giacobbe, M., Henzinger, T. A., & Kong, H. (2017). Conic
abstractions for hybrid systems (Vol. 10419, pp. 116–132). Presented at the FORMATS:
Formal Modelling and Analysis of Timed Systems, Berlin, Germany: Springer. https://doi.org/10.1007/978-3-319-65765-3_7'
chicago: Bogomolov, Sergiy, Mirco Giacobbe, Thomas A Henzinger, and Hui Kong. “Conic
Abstractions for Hybrid Systems,” 10419:116–32. Springer, 2017. https://doi.org/10.1007/978-3-319-65765-3_7.
ieee: 'S. Bogomolov, M. Giacobbe, T. A. Henzinger, and H. Kong, “Conic abstractions
for hybrid systems,” presented at the FORMATS: Formal Modelling and Analysis of
Timed Systems, Berlin, Germany, 2017, vol. 10419, pp. 116–132.'
ista: 'Bogomolov S, Giacobbe M, Henzinger TA, Kong H. 2017. Conic abstractions for
hybrid systems. FORMATS: Formal Modelling and Analysis of Timed Systems, LNCS,
vol. 10419, 116–132.'
mla: Bogomolov, Sergiy, et al. Conic Abstractions for Hybrid Systems. Vol.
10419, Springer, 2017, pp. 116–32, doi:10.1007/978-3-319-65765-3_7.
short: S. Bogomolov, M. Giacobbe, T.A. Henzinger, H. Kong, in:, Springer, 2017,
pp. 116–132.
conference:
end_date: 2017-09-07
location: Berlin, Germany
name: 'FORMATS: Formal Modelling and Analysis of Timed Systems'
start_date: 2017-09-05
date_created: 2018-12-11T11:47:41Z
date_published: 2017-09-01T00:00:00Z
date_updated: 2023-09-07T12:53:00Z
day: '01'
ddc:
- '005'
department:
- _id: ToHe
doi: 10.1007/978-3-319-65765-3_7
file:
- access_level: open_access
checksum: faf546914ba29bcf9974ee36b6b16750
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:12:38Z
date_updated: 2020-07-14T12:47:31Z
file_id: '4956'
file_name: IST-2017-831-v1+1_main.pdf
file_size: 3806864
relation: main_file
file_date_updated: 2020-07-14T12:47:31Z
has_accepted_license: '1'
language:
- iso: eng
month: '09'
oa: 1
oa_version: Submitted Version
page: 116 - 132
project:
- _id: 25F5A88A-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: S11402-N23
name: Moderne Concurrency Paradigms
- _id: 25F42A32-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: Z211
name: The Wittgenstein Prize
publication_identifier:
isbn:
- 978-331965764-6
publication_status: published
publisher: Springer
publist_id: '7129'
pubrep_id: '831'
quality_controlled: '1'
related_material:
record:
- id: '6894'
relation: dissertation_contains
status: public
scopus_import: 1
status: public
title: Conic abstractions for hybrid systems
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: '10419 '
year: '2017'
...
---
_id: '631'
abstract:
- lang: eng
text: Template polyhedra generalize intervals and octagons to polyhedra whose facets
are orthogonal to a given set of arbitrary directions. They have been employed
in the abstract interpretation of programs and, with particular success, in the
reachability analysis of hybrid automata. While previously, the choice of directions
has been left to the user or a heuristic, we present a method for the automatic
discovery of directions that generalize and eliminate spurious counterexamples.
We show that for the class of convex hybrid automata, i.e., hybrid automata with
(possibly nonlinear) convex constraints on derivatives, such directions always
exist and can be found using convex optimization. We embed our method inside a
CEGAR loop, thus enabling the time-unbounded reachability analysis of an important
and richer class of hybrid automata than was previously possible. We evaluate
our method on several benchmarks, demonstrating also its superior efficiency for
the special case of linear hybrid automata.
acknowledgement: This research was supported in part by the Austrian Science Fund
(FWF) under grants S11402-N23 (RiSE/SHiNE) and Z211-N23 (Wittgenstein Award), by
the European Commission under grant 643921 (UnCoVerCPS), and by the ARC project
DP140104219 (Robust AI Planning for Hybrid Systems).
alternative_title:
- LNCS
author:
- first_name: Sergiy
full_name: Bogomolov, Sergiy
id: 369D9A44-F248-11E8-B48F-1D18A9856A87
last_name: Bogomolov
orcid: 0000-0002-0686-0365
- first_name: Goran
full_name: Frehse, Goran
last_name: Frehse
- first_name: Mirco
full_name: Giacobbe, Mirco
id: 3444EA5E-F248-11E8-B48F-1D18A9856A87
last_name: Giacobbe
orcid: 0000-0001-8180-0904
- first_name: Thomas A
full_name: Henzinger, Thomas A
id: 40876CD8-F248-11E8-B48F-1D18A9856A87
last_name: Henzinger
orcid: 0000−0002−2985−7724
citation:
ama: 'Bogomolov S, Frehse G, Giacobbe M, Henzinger TA. Counterexample guided refinement
of template polyhedra. In: Vol 10205. Springer; 2017:589-606. doi:10.1007/978-3-662-54577-5_34'
apa: 'Bogomolov, S., Frehse, G., Giacobbe, M., & Henzinger, T. A. (2017). Counterexample
guided refinement of template polyhedra (Vol. 10205, pp. 589–606). Presented at
the TACAS: Tools and Algorithms for the Construction and Analysis of Systems,
Uppsala, Sweden: Springer. https://doi.org/10.1007/978-3-662-54577-5_34'
chicago: Bogomolov, Sergiy, Goran Frehse, Mirco Giacobbe, and Thomas A Henzinger.
“Counterexample Guided Refinement of Template Polyhedra,” 10205:589–606. Springer,
2017. https://doi.org/10.1007/978-3-662-54577-5_34.
ieee: 'S. Bogomolov, G. Frehse, M. Giacobbe, and T. A. Henzinger, “Counterexample
guided refinement of template polyhedra,” presented at the TACAS: Tools and Algorithms
for the Construction and Analysis of Systems, Uppsala, Sweden, 2017, vol. 10205,
pp. 589–606.'
ista: 'Bogomolov S, Frehse G, Giacobbe M, Henzinger TA. 2017. Counterexample guided
refinement of template polyhedra. TACAS: Tools and Algorithms for the Construction
and Analysis of Systems, LNCS, vol. 10205, 589–606.'
mla: Bogomolov, Sergiy, et al. Counterexample Guided Refinement of Template Polyhedra.
Vol. 10205, Springer, 2017, pp. 589–606, doi:10.1007/978-3-662-54577-5_34.
short: S. Bogomolov, G. Frehse, M. Giacobbe, T.A. Henzinger, in:, Springer, 2017,
pp. 589–606.
conference:
end_date: 2017-04-29
location: Uppsala, Sweden
name: 'TACAS: Tools and Algorithms for the Construction and Analysis of Systems'
start_date: 2017-04-22
date_created: 2018-12-11T11:47:36Z
date_published: 2017-03-31T00:00:00Z
date_updated: 2023-09-07T12:53:00Z
day: '31'
ddc:
- '000'
department:
- _id: ToHe
doi: 10.1007/978-3-662-54577-5_34
file:
- access_level: open_access
checksum: f395d0d20102b89aeaad8b4ef4f18f4f
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:11:41Z
date_updated: 2020-07-14T12:47:27Z
file_id: '4897'
file_name: IST-2017-741-v1+1_main.pdf
file_size: 569863
relation: main_file
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checksum: f416ee1ae4497b23ecdf28b1f18bb8df
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:11:42Z
date_updated: 2020-07-14T12:47:27Z
file_id: '4898'
file_name: IST-2018-741-v2+2_main.pdf
file_size: 563276
relation: main_file
file_date_updated: 2020-07-14T12:47:27Z
has_accepted_license: '1'
intvolume: ' 10205'
language:
- iso: eng
month: '03'
oa: 1
oa_version: Submitted Version
page: 589 - 606
project:
- _id: 25F5A88A-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: S11402-N23
name: Moderne Concurrency Paradigms
- _id: 25F42A32-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: Z211
name: The Wittgenstein Prize
publication_identifier:
isbn:
- 978-366254576-8
publication_status: published
publisher: Springer
publist_id: '7162'
pubrep_id: '966'
quality_controlled: '1'
related_material:
record:
- id: '6894'
relation: dissertation_contains
status: public
scopus_import: 1
status: public
title: Counterexample guided refinement of template polyhedra
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 10205
year: '2017'
...
---
_id: '1144'
abstract:
- lang: eng
text: We show that matrix elements of functions of N × N Wigner matrices fluctuate
on a scale of order N−1/2 and we identify the limiting fluctuation. Our result
holds for any function f of the matrix that has bounded variation thus considerably
relaxing the regularity requirement imposed in [7, 11].
acknowledgement: Partially supported by the IST Austria Excellence Scholarship.
article_number: '86'
author:
- first_name: László
full_name: Erdös, László
id: 4DBD5372-F248-11E8-B48F-1D18A9856A87
last_name: Erdös
orcid: 0000-0001-5366-9603
- first_name: Dominik J
full_name: Schröder, Dominik J
id: 408ED176-F248-11E8-B48F-1D18A9856A87
last_name: Schröder
orcid: 0000-0002-2904-1856
citation:
ama: Erdös L, Schröder DJ. Fluctuations of functions of Wigner matrices. Electronic
Communications in Probability. 2017;21. doi:10.1214/16-ECP38
apa: Erdös, L., & Schröder, D. J. (2017). Fluctuations of functions of Wigner
matrices. Electronic Communications in Probability. Institute of Mathematical
Statistics. https://doi.org/10.1214/16-ECP38
chicago: Erdös, László, and Dominik J Schröder. “Fluctuations of Functions of Wigner
Matrices.” Electronic Communications in Probability. Institute of Mathematical
Statistics, 2017. https://doi.org/10.1214/16-ECP38.
ieee: L. Erdös and D. J. Schröder, “Fluctuations of functions of Wigner matrices,”
Electronic Communications in Probability, vol. 21. Institute of Mathematical
Statistics, 2017.
ista: Erdös L, Schröder DJ. 2017. Fluctuations of functions of Wigner matrices.
Electronic Communications in Probability. 21, 86.
mla: Erdös, László, and Dominik J. Schröder. “Fluctuations of Functions of Wigner
Matrices.” Electronic Communications in Probability, vol. 21, 86, Institute
of Mathematical Statistics, 2017, doi:10.1214/16-ECP38.
short: L. Erdös, D.J. Schröder, Electronic Communications in Probability 21 (2017).
date_created: 2018-12-11T11:50:23Z
date_published: 2017-01-02T00:00:00Z
date_updated: 2023-09-07T12:54:12Z
day: '02'
ddc:
- '510'
department:
- _id: LaEr
doi: 10.1214/16-ECP38
ec_funded: 1
file:
- access_level: open_access
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:18:10Z
date_updated: 2018-12-12T10:18:10Z
file_id: '5329'
file_name: IST-2017-747-v1+1_euclid.ecp.1483347665.pdf
file_size: 440770
relation: main_file
file_date_updated: 2018-12-12T10:18:10Z
has_accepted_license: '1'
intvolume: ' 21'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
project:
- _id: 258DCDE6-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '338804'
name: Random matrices, universality and disordered quantum systems
publication: Electronic Communications in Probability
publication_status: published
publisher: Institute of Mathematical Statistics
publist_id: '6214'
pubrep_id: '747'
quality_controlled: '1'
related_material:
record:
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relation: dissertation_contains
status: public
scopus_import: 1
status: public
title: Fluctuations of functions of Wigner matrices
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 21
year: '2017'
...
---
_id: '486'
abstract:
- lang: eng
text: Color texture reproduction in 3D printing commonly ignores volumetric light
transport (cross-talk) between surface points on a 3D print. Such light diffusion
leads to significant blur of details and color bleeding, and is particularly severe
for highly translucent resin-based print materials. Given their widely varying
scattering properties, this cross-talk between surface points strongly depends
on the internal structure of the volume surrounding each surface point. Existing
scattering-aware methods use simplified models for light diffusion, and often
accept the visual blur as an immutable property of the print medium. In contrast,
our work counteracts heterogeneous scattering to obtain the impression of a crisp
albedo texture on top of the 3D print, by optimizing for a fully volumetric material
distribution that preserves the target appearance. Our method employs an efficient
numerical optimizer on top of a general Monte-Carlo simulation of heterogeneous
scattering, supported by a practical calibration procedure to obtain scattering
parameters from a given set of printer materials. Despite the inherent translucency
of the medium, we reproduce detailed surface textures on 3D prints. We evaluate
our system using a commercial, five-tone 3D print process and compare against
the printer’s native color texturing mode, demonstrating that our method preserves
high-frequency features well without having to compromise on color gamut.
article_number: '241'
article_processing_charge: No
article_type: original
author:
- first_name: Oskar
full_name: Elek, Oskar
last_name: Elek
- first_name: Denis
full_name: Sumin, Denis
last_name: Sumin
- first_name: Ran
full_name: Zhang, Ran
id: 4DDBCEB0-F248-11E8-B48F-1D18A9856A87
last_name: Zhang
orcid: 0000-0002-3808-281X
- first_name: Tim
full_name: Weyrich, Tim
last_name: Weyrich
- first_name: Karol
full_name: Myszkowski, Karol
last_name: Myszkowski
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
- first_name: Alexander
full_name: Wilkie, Alexander
last_name: Wilkie
- first_name: Jaroslav
full_name: Krivanek, Jaroslav
last_name: Krivanek
citation:
ama: Elek O, Sumin D, Zhang R, et al. Scattering-aware texture reproduction for
3D printing. ACM Transactions on Graphics. 2017;36(6). doi:10.1145/3130800.3130890
apa: Elek, O., Sumin, D., Zhang, R., Weyrich, T., Myszkowski, K., Bickel, B., …
Krivanek, J. (2017). Scattering-aware texture reproduction for 3D printing. ACM
Transactions on Graphics. ACM. https://doi.org/10.1145/3130800.3130890
chicago: Elek, Oskar, Denis Sumin, Ran Zhang, Tim Weyrich, Karol Myszkowski, Bernd
Bickel, Alexander Wilkie, and Jaroslav Krivanek. “Scattering-Aware Texture Reproduction
for 3D Printing.” ACM Transactions on Graphics. ACM, 2017. https://doi.org/10.1145/3130800.3130890.
ieee: O. Elek et al., “Scattering-aware texture reproduction for 3D printing,”
ACM Transactions on Graphics, vol. 36, no. 6. ACM, 2017.
ista: Elek O, Sumin D, Zhang R, Weyrich T, Myszkowski K, Bickel B, Wilkie A, Krivanek
J. 2017. Scattering-aware texture reproduction for 3D printing. ACM Transactions
on Graphics. 36(6), 241.
mla: Elek, Oskar, et al. “Scattering-Aware Texture Reproduction for 3D Printing.”
ACM Transactions on Graphics, vol. 36, no. 6, 241, ACM, 2017, doi:10.1145/3130800.3130890.
short: O. Elek, D. Sumin, R. Zhang, T. Weyrich, K. Myszkowski, B. Bickel, A. Wilkie,
J. Krivanek, ACM Transactions on Graphics 36 (2017).
date_created: 2018-12-11T11:46:44Z
date_published: 2017-11-20T00:00:00Z
date_updated: 2023-09-07T13:11:15Z
day: '20'
ddc:
- '003'
- '000'
- '005'
department:
- _id: BeBi
doi: 10.1145/3130800.3130890
ec_funded: 1
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creator: system
date_created: 2018-12-12T10:10:46Z
date_updated: 2020-07-14T12:46:35Z
file_id: '4836'
file_name: IST-2018-1052-v1+1_ElekSumin2017SGA.pdf
file_size: 107349827
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date_updated: 2020-07-14T12:46:35Z
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file_name: ElekSumin2017SGA_reduced_file_size.pdf
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has_accepted_license: '1'
intvolume: ' 36'
issue: '6'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Submitted Version
project:
- _id: 2508E324-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '642841'
name: Distributed 3D Object Design
- _id: 24F9549A-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '715767'
name: 'MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and
Modeling'
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
publication: ACM Transactions on Graphics
publication_identifier:
issn:
- '07300301'
publication_status: published
publisher: ACM
publist_id: '7334'
pubrep_id: '1052'
quality_controlled: '1'
related_material:
record:
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relation: dissertation_contains
status: public
scopus_import: 1
status: public
title: Scattering-aware texture reproduction for 3D printing
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 36
year: '2017'
...
---
_id: '637'
abstract:
- lang: eng
text: For many cryptographic primitives, it is relatively easy to achieve selective
security (where the adversary commits a-priori to some of the choices to be made
later in the attack) but appears difficult to achieve the more natural notion
of adaptive security (where the adversary can make all choices on the go as the
attack progresses). A series of several recent works shows how to cleverly achieve
adaptive security in several such scenarios including generalized selective decryption
(Panjwani, TCC ’07 and Fuchsbauer et al., CRYPTO ’15), constrained PRFs (Fuchsbauer
et al., ASIACRYPT ’14), and Yao garbled circuits (Jafargholi and Wichs, TCC ’16b).
Although the above works expressed vague intuition that they share a common technique,
the connection was never made precise. In this work we present a new framework
that connects all of these works and allows us to present them in a unified and
simplified fashion. Moreover, we use the framework to derive a new result for
adaptively secure secret sharing over access structures defined via monotone circuits.
We envision that further applications will follow in the future. Underlying our
framework is the following simple idea. It is well known that selective security,
where the adversary commits to n-bits of information about his future choices,
automatically implies adaptive security at the cost of amplifying the adversary’s
advantage by a factor of up to 2n. However, in some cases the proof of selective
security proceeds via a sequence of hybrids, where each pair of adjacent hybrids
locally only requires some smaller partial information consisting of m ≪ n bits.
The partial information needed might be completely different between different
pairs of hybrids, and if we look across all the hybrids we might rely on the entire
n-bit commitment. Nevertheless, the above is sufficient to prove adaptive security,
at the cost of amplifying the adversary’s advantage by a factor of only 2m ≪ 2n.
In all of our examples using the above framework, the different hybrids are captured
by some sort of a graph pebbling game and the amount of information that the adversary
needs to commit to in each pair of hybrids is bounded by the maximum number of
pebbles in play at any point in time. Therefore, coming up with better strategies
for proving adaptive security translates to various pebbling strategies for different
types of graphs.
alternative_title:
- LNCS
author:
- first_name: Zahra
full_name: Jafargholi, Zahra
last_name: Jafargholi
- first_name: Chethan
full_name: Kamath Hosdurg, Chethan
id: 4BD3F30E-F248-11E8-B48F-1D18A9856A87
last_name: Kamath Hosdurg
- first_name: Karen
full_name: Klein, Karen
id: 3E83A2F8-F248-11E8-B48F-1D18A9856A87
last_name: Klein
- first_name: Ilan
full_name: Komargodski, Ilan
last_name: Komargodski
- first_name: Krzysztof Z
full_name: Pietrzak, Krzysztof Z
id: 3E04A7AA-F248-11E8-B48F-1D18A9856A87
last_name: Pietrzak
orcid: 0000-0002-9139-1654
- first_name: Daniel
full_name: Wichs, Daniel
last_name: Wichs
citation:
ama: 'Jafargholi Z, Kamath Hosdurg C, Klein K, Komargodski I, Pietrzak KZ, Wichs
D. Be adaptive avoid overcommitting. In: Katz J, Shacham H, eds. Vol 10401. Springer;
2017:133-163. doi:10.1007/978-3-319-63688-7_5'
apa: 'Jafargholi, Z., Kamath Hosdurg, C., Klein, K., Komargodski, I., Pietrzak,
K. Z., & Wichs, D. (2017). Be adaptive avoid overcommitting. In J. Katz &
H. Shacham (Eds.) (Vol. 10401, pp. 133–163). Presented at the CRYPTO: Cryptology,
Santa Barbara, CA, United States: Springer. https://doi.org/10.1007/978-3-319-63688-7_5'
chicago: Jafargholi, Zahra, Chethan Kamath Hosdurg, Karen Klein, Ilan Komargodski,
Krzysztof Z Pietrzak, and Daniel Wichs. “Be Adaptive Avoid Overcommitting.” edited
by Jonathan Katz and Hovav Shacham, 10401:133–63. Springer, 2017. https://doi.org/10.1007/978-3-319-63688-7_5.
ieee: 'Z. Jafargholi, C. Kamath Hosdurg, K. Klein, I. Komargodski, K. Z. Pietrzak,
and D. Wichs, “Be adaptive avoid overcommitting,” presented at the CRYPTO: Cryptology,
Santa Barbara, CA, United States, 2017, vol. 10401, pp. 133–163.'
ista: 'Jafargholi Z, Kamath Hosdurg C, Klein K, Komargodski I, Pietrzak KZ, Wichs
D. 2017. Be adaptive avoid overcommitting. CRYPTO: Cryptology, LNCS, vol. 10401,
133–163.'
mla: Jafargholi, Zahra, et al. Be Adaptive Avoid Overcommitting. Edited by
Jonathan Katz and Hovav Shacham, vol. 10401, Springer, 2017, pp. 133–63, doi:10.1007/978-3-319-63688-7_5.
short: Z. Jafargholi, C. Kamath Hosdurg, K. Klein, I. Komargodski, K.Z. Pietrzak,
D. Wichs, in:, J. Katz, H. Shacham (Eds.), Springer, 2017, pp. 133–163.
conference:
end_date: 2017-07-24
location: Santa Barbara, CA, United States
name: 'CRYPTO: Cryptology'
start_date: 2017-07-20
date_created: 2018-12-11T11:47:38Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2023-09-07T13:32:11Z
day: '01'
department:
- _id: KrPi
doi: 10.1007/978-3-319-63688-7_5
ec_funded: 1
editor:
- first_name: Jonathan
full_name: Katz, Jonathan
last_name: Katz
- first_name: Hovav
full_name: Shacham, Hovav
last_name: Shacham
intvolume: ' 10401'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://eprint.iacr.org/2017/515
month: '01'
oa: 1
oa_version: Submitted Version
page: 133 - 163
project:
- _id: 258AA5B2-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '682815'
name: Teaching Old Crypto New Tricks
publication_identifier:
isbn:
- 978-331963687-0
publication_status: published
publisher: Springer
publist_id: '7151'
quality_controlled: '1'
related_material:
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scopus_import: 1
status: public
title: Be adaptive avoid overcommitting
type: conference
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 10401
year: '2017'
...
---
_id: '9842'
abstract:
- lang: eng
text: Mathematica notebooks used to generate figures.
article_processing_charge: No
author:
- first_name: Alison
full_name: Etheridge, Alison
last_name: Etheridge
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: 'Etheridge A, Barton NH. Data for: Establishment in a new habitat by polygenic
adaptation. 2017. doi:10.17632/nw68fxzjpm.1'
apa: 'Etheridge, A., & Barton, N. H. (2017). Data for: Establishment in a new
habitat by polygenic adaptation. Mendeley Data. https://doi.org/10.17632/nw68fxzjpm.1'
chicago: 'Etheridge, Alison, and Nicholas H Barton. “Data for: Establishment in
a New Habitat by Polygenic Adaptation.” Mendeley Data, 2017. https://doi.org/10.17632/nw68fxzjpm.1.'
ieee: 'A. Etheridge and N. H. Barton, “Data for: Establishment in a new habitat
by polygenic adaptation.” Mendeley Data, 2017.'
ista: 'Etheridge A, Barton NH. 2017. Data for: Establishment in a new habitat by
polygenic adaptation, Mendeley Data, 10.17632/nw68fxzjpm.1.'
mla: 'Etheridge, Alison, and Nicholas H. Barton. Data for: Establishment in a
New Habitat by Polygenic Adaptation. Mendeley Data, 2017, doi:10.17632/nw68fxzjpm.1.'
short: A. Etheridge, N.H. Barton, (2017).
date_created: 2021-08-09T13:18:55Z
date_published: 2017-12-29T00:00:00Z
date_updated: 2023-09-11T13:41:21Z
day: '29'
department:
- _id: NiBa
doi: 10.17632/nw68fxzjpm.1
main_file_link:
- open_access: '1'
url: https://doi.org/10.17632/nw68fxzjpm.1
month: '12'
oa: 1
oa_version: Published Version
publisher: Mendeley Data
related_material:
record:
- id: '564'
relation: used_in_publication
status: public
status: public
title: 'Data for: Establishment in a new habitat by polygenic adaptation'
type: research_data_reference
user_id: 6785fbc1-c503-11eb-8a32-93094b40e1cf
year: '2017'
...
---
_id: '202'
abstract:
- lang: eng
text: 'Restriction-modification (RM) represents the simplest and possibly the most
widespread mechanism of self/non-self discrimination in nature. In order to provide
bacteria with immunity against bacteriophages and other parasitic genetic elements,
RM systems rely on a balance between two enzymes: the restriction enzyme, which
cleaves non-self DNA at specific restriction sites, and the modification enzyme,
which tags the host’s DNA as self and thus protects it from cleavage. In this
thesis, I use population and single-cell level experiments in combination with
mathematical modeling to study different aspects of the interplay between RM systems,
bacteria and bacteriophages. First, I analyze how mutations in phage restriction
sites affect the probability of phage escape – an inherently stochastic process,
during which phages accidently get modified instead of restricted. Next, I use
single-cell experiments to show that RM systems can, with a low probability, attack
the genome of their bacterial host and that this primitive form of autoimmunity
leads to a tradeoff between the evolutionary cost and benefit of RM systems. Finally,
I investigate the nature of interactions between bacteria, RM systems and temperate
bacteriophages to find that, as a consequence of phage escape and its impact on
population dynamics, RM systems can promote acquisition of symbiotic bacteriophages,
rather than limit it. The results presented here uncover new fundamental biological
properties of RM systems and highlight their importance in the ecology and evolution
of bacteria, bacteriophages and their interactions.'
acknowledgement: "During my PhD studies, I received help from many people, all of
which unfortunately cannot be listed here. I thank them deeply and hope that I never
made them regret their kindness.\r\nI would like to express my deepest gratitude
to Călin Guet, who went far beyond his responsibilities as an advisor and was to
me also a great mentor and a friend. Călin never questioned my potential or lacked
compassion and I cannot thank him enough for cultivating in me an independent scientist.
I was amazed by his ability to recognize the most fascinating scientific problems
in objects of study that others would find mundane. I hope I adopted at least a
fraction of this ability.\r\nI will be forever grateful to Bruce Levin for all his
support and especially for giving me the best possible example of how one can practice
excellent science with humor and style. Working with Bruce was a true privilege.\r\nI
thank Jonathan Bollback and Gašper Tkačik for serving in my PhD committee and the
Austrian Academy of Science for funding my PhD research via the DOC fellowship.\r\nI
thank all our lab members: Tobias Bergmiller for his guidance, especially in the
first years of my research, and for being a good friend throughout; Remy Chait for
staying in the lab at unreasonable hours and for the good laughs at bad jokes we
shared; Anna Staron for supportively listening to my whines whenever I had to run
a gel; Magdalena Steinrück for her pioneering work in the lab; Kathrin Tomasek for
keeping the entropic forces in check and for her FACS virtuosity; Isabella Tomanek
for always being nice to me, no matter how much bench space I took from her.\r\nI
thank all my collaborators: Reiko Okura and Yuichi Wakamoto for performing and analyzing
the microfluidic experiments; Long Qian and Edo Kussell for their bioinformatics
analysis; Dominik Refardt for the λ kan phage; Moritz for his help with the mathematical
modeling. I thank Fabienne Jesse for her tireless editorial work on all our manuscripts.\r\nFinally,
I would like to thank my family and especially my wife Edita, who sacrificed a lot
so that I can pursue my goals and dreams.\r\n"
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Maros
full_name: Pleska, Maros
id: 4569785E-F248-11E8-B48F-1D18A9856A87
last_name: Pleska
orcid: 0000-0001-7460-7479
citation:
ama: Pleska M. Biology of restriction-modification systems at the single-cell and
population level. 2017. doi:10.15479/AT:ISTA:th_916
apa: Pleska, M. (2017). Biology of restriction-modification systems at the single-cell
and population level. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:th_916
chicago: Pleska, Maros. “Biology of Restriction-Modification Systems at the Single-Cell
and Population Level.” Institute of Science and Technology Austria, 2017. https://doi.org/10.15479/AT:ISTA:th_916.
ieee: M. Pleska, “Biology of restriction-modification systems at the single-cell
and population level,” Institute of Science and Technology Austria, 2017.
ista: Pleska M. 2017. Biology of restriction-modification systems at the single-cell
and population level. Institute of Science and Technology Austria.
mla: Pleska, Maros. Biology of Restriction-Modification Systems at the Single-Cell
and Population Level. Institute of Science and Technology Austria, 2017, doi:10.15479/AT:ISTA:th_916.
short: M. Pleska, Biology of Restriction-Modification Systems at the Single-Cell
and Population Level, Institute of Science and Technology Austria, 2017.
date_created: 2018-12-11T11:45:10Z
date_published: 2017-10-01T00:00:00Z
date_updated: 2023-09-15T12:04:56Z
day: '01'
ddc:
- '576'
- '579'
degree_awarded: PhD
department:
- _id: CaGu
doi: 10.15479/AT:ISTA:th_916
file:
- access_level: open_access
checksum: 33cfb59674e91f82e3738396d3fb3776
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:08:48Z
date_updated: 2020-07-14T12:45:24Z
file_id: '4710'
file_name: IST-2018-916-v1+3_2017_Pleska_Maros_Thesis.pdf
file_size: 18569590
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creator: dernst
date_created: 2019-04-05T08:33:14Z
date_updated: 2020-07-14T12:45:24Z
file_id: '6204'
file_name: 2017_Pleska_Maros_Thesis.docx
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language:
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month: '10'
oa: 1
oa_version: Published Version
page: '126'
project:
- _id: 251D65D8-B435-11E9-9278-68D0E5697425
grant_number: '24210'
name: Effects of Stochasticity on the Function of Restriction-Modi cation Systems
at the Single-Cell Level (DOC Fellowship)
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
publist_id: '7711'
pubrep_id: '916'
related_material:
record:
- id: '1243'
relation: part_of_dissertation
status: public
- id: '561'
relation: part_of_dissertation
status: public
- id: '457'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Calin C
full_name: Guet, Calin C
id: 47F8433E-F248-11E8-B48F-1D18A9856A87
last_name: Guet
orcid: 0000-0001-6220-2052
title: Biology of restriction-modification systems at the single-cell and population
level
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2017'
...
---
_id: '6287'
abstract:
- lang: eng
text: The main objects considered in the present work are simplicial and CW-complexes
with vertices forming a random point cloud. In particular, we consider a Poisson
point process in R^n and study Delaunay and Voronoi complexes of the first and
higher orders and weighted Delaunay complexes obtained as sections of Delaunay
complexes, as well as the Čech complex. Further, we examine theDelaunay complex
of a Poisson point process on the sphere S^n, as well as of a uniform point cloud,
which is equivalent to the convex hull, providing a connection to the theory of
random polytopes. Each of the complexes in question can be endowed with a radius
function, which maps its cells to the radii of appropriately chosen circumspheres,
called the radius of the cell. Applying and developing discrete Morse theory for
these functions, joining it together with probabilistic and sometimes analytic
machinery, and developing several integral geometric tools, we aim at getting
the distributions of circumradii of typical cells. For all considered complexes,
we are able to generalize and obtain up to constants the distribution of radii
of typical intervals of all types. In low dimensions the constants can be computed
explicitly, thus providing the explicit expressions for the expected numbers of
cells. In particular, it allows to find the expected density of simplices of every
dimension for a Poisson point process in R^4, whereas the result for R^3 was known
already in 1970's.
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Anton
full_name: Nikitenko, Anton
id: 3E4FF1BA-F248-11E8-B48F-1D18A9856A87
last_name: Nikitenko
orcid: 0000-0002-0659-3201
citation:
ama: Nikitenko A. Discrete Morse theory for random complexes . 2017. doi:10.15479/AT:ISTA:th_873
apa: Nikitenko, A. (2017). Discrete Morse theory for random complexes . Institute
of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:th_873
chicago: Nikitenko, Anton. “Discrete Morse Theory for Random Complexes .” Institute
of Science and Technology Austria, 2017. https://doi.org/10.15479/AT:ISTA:th_873.
ieee: A. Nikitenko, “Discrete Morse theory for random complexes ,” Institute of
Science and Technology Austria, 2017.
ista: Nikitenko A. 2017. Discrete Morse theory for random complexes . Institute
of Science and Technology Austria.
mla: Nikitenko, Anton. Discrete Morse Theory for Random Complexes . Institute
of Science and Technology Austria, 2017, doi:10.15479/AT:ISTA:th_873.
short: A. Nikitenko, Discrete Morse Theory for Random Complexes , Institute of Science
and Technology Austria, 2017.
date_created: 2019-04-09T15:04:32Z
date_published: 2017-10-27T00:00:00Z
date_updated: 2023-09-15T12:10:34Z
day: '27'
ddc:
- '514'
- '516'
- '519'
degree_awarded: PhD
department:
- _id: HeEd
doi: 10.15479/AT:ISTA:th_873
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creator: dernst
date_created: 2019-04-09T14:54:51Z
date_updated: 2020-07-14T12:47:26Z
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file_name: 2017_Thesis_Nikitenko.pdf
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last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
title: 'Discrete Morse theory for random complexes '
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