--- _id: '10672' abstract: - lang: eng text: The family of feedback alignment (FA) algorithms aims to provide a more biologically motivated alternative to backpropagation (BP), by substituting the computations that are unrealistic to be implemented in physical brains. While FA algorithms have been shown to work well in practice, there is a lack of rigorous theory proofing their learning capabilities. Here we introduce the first feedback alignment algorithm with provable learning guarantees. In contrast to existing work, we do not require any assumption about the size or depth of the network except that it has a single output neuron, i.e., such as for binary classification tasks. We show that our FA algorithm can deliver its theoretical promises in practice, surpassing the learning performance of existing FA methods and matching backpropagation in binary classification tasks. Finally, we demonstrate the limits of our FA variant when the number of output neurons grows beyond a certain quantity. acknowledgement: "This research was supported in part by the Austrian Science Fund (FWF) under grant Z211-N23\r\n(Wittgenstein Award).\r\n" article_processing_charge: No author: - first_name: Mathias full_name: Lechner, Mathias id: 3DC22916-F248-11E8-B48F-1D18A9856A87 last_name: Lechner citation: ama: 'Lechner M. Learning representations for binary-classification without backpropagation. In: 8th International Conference on Learning Representations. ICLR; 2020.' apa: 'Lechner, M. (2020). Learning representations for binary-classification without backpropagation. In 8th International Conference on Learning Representations. Virtual ; Addis Ababa, Ethiopia: ICLR.' chicago: Lechner, Mathias. “Learning Representations for Binary-Classification without Backpropagation.” In 8th International Conference on Learning Representations. ICLR, 2020. ieee: M. Lechner, “Learning representations for binary-classification without backpropagation,” in 8th International Conference on Learning Representations, Virtual ; Addis Ababa, Ethiopia, 2020. ista: 'Lechner M. 2020. Learning representations for binary-classification without backpropagation. 8th International Conference on Learning Representations. ICLR: International Conference on Learning Representations.' mla: Lechner, Mathias. “Learning Representations for Binary-Classification without Backpropagation.” 8th International Conference on Learning Representations, ICLR, 2020. short: M. Lechner, in:, 8th International Conference on Learning Representations, ICLR, 2020. conference: end_date: 2020-05-01 location: Virtual ; Addis Ababa, Ethiopia name: 'ICLR: International Conference on Learning Representations' start_date: 2020-04-26 date_created: 2022-01-25T15:50:00Z date_published: 2020-03-11T00:00:00Z date_updated: 2023-04-03T07:33:40Z day: '11' ddc: - '000' department: - _id: GradSch - _id: ToHe file: - access_level: open_access checksum: ea13d42dd4541ddb239b6a75821fd6c9 content_type: application/pdf creator: mlechner date_created: 2022-01-26T07:35:17Z date_updated: 2022-01-26T07:35:17Z file_id: '10677' file_name: iclr_2020.pdf file_size: 249431 relation: main_file success: 1 file_date_updated: 2022-01-26T07:35:17Z has_accepted_license: '1' language: - iso: eng license: https://creativecommons.org/licenses/by-nc-nd/3.0/ main_file_link: - open_access: '1' url: https://openreview.net/forum?id=Bke61krFvS month: '03' oa: 1 oa_version: Published Version project: - _id: 25F42A32-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: Z211 name: The Wittgenstein Prize publication: 8th International Conference on Learning Representations publication_status: published publisher: ICLR quality_controlled: '1' scopus_import: '1' status: public title: Learning representations for binary-classification without backpropagation tmp: image: /images/cc_by_nc_nd.png legal_code_url: https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode name: Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) short: CC BY-NC-ND (3.0) type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2020' ... --- _id: '8188' abstract: - lang: eng text: "A natural approach to generative modeling of videos is to represent them as a composition of moving objects. Recent works model a set of 2D sprites over a slowly-varying background, but without considering the underlying 3D scene that\r\ngives rise to them. We instead propose to model a video as the view seen while moving through a scene with multiple 3D objects and a 3D background. Our model is trained from monocular videos without any supervision, yet learns to\r\ngenerate coherent 3D scenes containing several moving objects. We conduct detailed experiments on two datasets, going beyond the visual complexity supported by state-of-the-art generative approaches. We evaluate our method on\r\ndepth-prediction and 3D object detection---tasks which cannot be addressed by those earlier works---and show it out-performs them even on 2D instance segmentation and tracking." acknowledged_ssus: - _id: ScienComp acknowledgement: "This research was supported by the Scientific Service Units (SSU) of IST Austria through resources\r\nprovided by Scientific Computing (SciComp). PH is employed part-time by Blackford Analysis, but\r\nthey did not support this project in any way." article_processing_charge: No author: - first_name: Paul M full_name: Henderson, Paul M id: 13C09E74-18D9-11E9-8878-32CFE5697425 last_name: Henderson orcid: 0000-0002-5198-7445 - first_name: Christoph full_name: Lampert, Christoph id: 40C20FD2-F248-11E8-B48F-1D18A9856A87 last_name: Lampert orcid: 0000-0001-8622-7887 citation: ama: 'Henderson PM, Lampert C. Unsupervised object-centric video generation and decomposition in 3D. In: 34th Conference on Neural Information Processing Systems. Vol 33. Curran Associates; 2020:3106–3117.' apa: 'Henderson, P. M., & Lampert, C. (2020). Unsupervised object-centric video generation and decomposition in 3D. In 34th Conference on Neural Information Processing Systems (Vol. 33, pp. 3106–3117). Vancouver, Canada: Curran Associates.' chicago: Henderson, Paul M, and Christoph Lampert. “Unsupervised Object-Centric Video Generation and Decomposition in 3D.” In 34th Conference on Neural Information Processing Systems, 33:3106–3117. Curran Associates, 2020. ieee: P. M. Henderson and C. Lampert, “Unsupervised object-centric video generation and decomposition in 3D,” in 34th Conference on Neural Information Processing Systems, Vancouver, Canada, 2020, vol. 33, pp. 3106–3117. ista: 'Henderson PM, Lampert C. 2020. Unsupervised object-centric video generation and decomposition in 3D. 34th Conference on Neural Information Processing Systems. NeurIPS: Neural Information Processing Systems vol. 33, 3106–3117.' mla: Henderson, Paul M., and Christoph Lampert. “Unsupervised Object-Centric Video Generation and Decomposition in 3D.” 34th Conference on Neural Information Processing Systems, vol. 33, Curran Associates, 2020, pp. 3106–3117. short: P.M. Henderson, C. Lampert, in:, 34th Conference on Neural Information Processing Systems, Curran Associates, 2020, pp. 3106–3117. conference: end_date: 2020-12-12 location: Vancouver, Canada name: 'NeurIPS: Neural Information Processing Systems' start_date: 2020-12-06 date_created: 2020-07-31T16:59:19Z date_published: 2020-07-07T00:00:00Z date_updated: 2023-04-25T09:49:58Z day: '07' department: - _id: ChLa external_id: arxiv: - '2007.06705' intvolume: ' 33' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2007.06705 month: '07' oa: 1 oa_version: Preprint page: 3106–3117 publication: 34th Conference on Neural Information Processing Systems publication_identifier: isbn: - '9781713829546' publication_status: published publisher: Curran Associates quality_controlled: '1' status: public title: Unsupervised object-centric video generation and decomposition in 3D type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 33 year: '2020' ... --- _id: '7474' abstract: - lang: eng text: This booklet is a collection of abstracts presented at the AHPC conference. article_processing_charge: No citation: ama: 'Schlögl A, Kiss J, Elefante S, eds. Austrian High-Performance-Computing Meeting (AHPC2020). Klosterneuburg, Austria: IST Austria; 2020. doi:10.15479/AT:ISTA:7474' apa: 'Schlögl, A., Kiss, J., & Elefante, S. (Eds.). (2020). Austrian High-Performance-Computing meeting (AHPC2020). Presented at the AHPC: Austrian High-Performance-Computing Meeting, Klosterneuburg, Austria: IST Austria. https://doi.org/10.15479/AT:ISTA:7474' chicago: 'Schlögl, Alois, Janos Kiss, and Stefano Elefante, eds. Austrian High-Performance-Computing Meeting (AHPC2020). Klosterneuburg, Austria: IST Austria, 2020. https://doi.org/10.15479/AT:ISTA:7474.' ieee: 'A. Schlögl, J. Kiss, and S. Elefante, Eds., Austrian High-Performance-Computing meeting (AHPC2020). Klosterneuburg, Austria: IST Austria, 2020.' ista: 'Schlögl A, Kiss J, Elefante S eds. 2020. Austrian High-Performance-Computing meeting (AHPC2020), Klosterneuburg, Austria: IST Austria, 72p.' mla: Schlögl, Alois, et al., editors. Austrian High-Performance-Computing Meeting (AHPC2020). IST Austria, 2020, doi:10.15479/AT:ISTA:7474. short: A. Schlögl, J. Kiss, S. Elefante, eds., Austrian High-Performance-Computing Meeting (AHPC2020), IST Austria, Klosterneuburg, Austria, 2020. conference: end_date: 2020-02-21 location: Klosterneuburg, Austria name: 'AHPC: Austrian High-Performance-Computing Meeting' start_date: 2020-02-19 date_created: 2020-02-11T07:59:04Z date_published: 2020-02-19T00:00:00Z date_updated: 2023-05-16T07:48:28Z day: '19' ddc: - '000' department: - _id: ScienComp doi: 10.15479/AT:ISTA:7474 editor: - first_name: Alois full_name: Schlögl, Alois id: 45BF87EE-F248-11E8-B48F-1D18A9856A87 last_name: Schlögl orcid: 0000-0002-5621-8100 - first_name: Janos full_name: Kiss, Janos id: 3D3A06F8-F248-11E8-B48F-1D18A9856A87 last_name: Kiss - first_name: Stefano full_name: Elefante, Stefano id: 490F40CE-F248-11E8-B48F-1D18A9856A87 last_name: Elefante file: - access_level: open_access checksum: 49798edb9e57bbd6be18362d1d7b18a9 content_type: application/pdf creator: schloegl date_created: 2020-02-19T06:53:38Z date_updated: 2020-07-14T12:47:59Z file_id: '7504' file_name: BOOKLET_AHPC2020.final.pdf file_size: 90899507 relation: main_file file_date_updated: 2020-07-14T12:47:59Z has_accepted_license: '1' language: - iso: eng month: '02' oa: 1 oa_version: Published Version page: '72' place: Klosterneuburg, Austria publication_identifier: isbn: - 978-3-99078-004-6 publication_status: published publisher: IST Austria quality_controlled: '1' status: public title: Austrian High-Performance-Computing meeting (AHPC2020) 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: book_editor user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2020' ... --- _id: '7808' abstract: - lang: eng text: Quantization converts neural networks into low-bit fixed-point computations which can be carried out by efficient integer-only hardware, and is standard practice for the deployment of neural networks on real-time embedded devices. However, like their real-numbered counterpart, quantized networks are not immune to malicious misclassification caused by adversarial attacks. We investigate how quantization affects a network’s robustness to adversarial attacks, which is a formal verification question. We show that neither robustness nor non-robustness are monotonic with changing the number of bits for the representation and, also, neither are preserved by quantization from a real-numbered network. For this reason, we introduce a verification method for quantized neural networks which, using SMT solving over bit-vectors, accounts for their exact, bit-precise semantics. We built a tool and analyzed the effect of quantization on a classifier for the MNIST dataset. We demonstrate that, compared to our method, existing methods for the analysis of real-numbered networks often derive false conclusions about their quantizations, both when determining robustness and when detecting attacks, and that existing methods for quantized networks often miss attacks. Furthermore, we applied our method beyond robustness, showing how the number of bits in quantization enlarges the gender bias of a predictor for students’ grades. alternative_title: - LNCS article_processing_charge: No author: - 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: Mathias full_name: Lechner, Mathias id: 3DC22916-F248-11E8-B48F-1D18A9856A87 last_name: Lechner citation: ama: 'Giacobbe M, Henzinger TA, Lechner M. How many bits does it take to quantize your neural network? In: International Conference on Tools and Algorithms for the Construction and Analysis of Systems. Vol 12079. Springer Nature; 2020:79-97. doi:10.1007/978-3-030-45237-7_5' apa: 'Giacobbe, M., Henzinger, T. A., & Lechner, M. (2020). How many bits does it take to quantize your neural network? In International Conference on Tools and Algorithms for the Construction and Analysis of Systems (Vol. 12079, pp. 79–97). Dublin, Ireland: Springer Nature. https://doi.org/10.1007/978-3-030-45237-7_5' chicago: Giacobbe, Mirco, Thomas A Henzinger, and Mathias Lechner. “How Many Bits Does It Take to Quantize Your Neural Network?” In International Conference on Tools and Algorithms for the Construction and Analysis of Systems, 12079:79–97. Springer Nature, 2020. https://doi.org/10.1007/978-3-030-45237-7_5. ieee: M. Giacobbe, T. A. Henzinger, and M. Lechner, “How many bits does it take to quantize your neural network?,” in International Conference on Tools and Algorithms for the Construction and Analysis of Systems, Dublin, Ireland, 2020, vol. 12079, pp. 79–97. ista: 'Giacobbe M, Henzinger TA, Lechner M. 2020. How many bits does it take to quantize your neural network? International Conference on Tools and Algorithms for the Construction and Analysis of Systems. TACAS: Tools and Algorithms for the Construction and Analysis of Systems, LNCS, vol. 12079, 79–97.' mla: Giacobbe, Mirco, et al. “How Many Bits Does It Take to Quantize Your Neural Network?” International Conference on Tools and Algorithms for the Construction and Analysis of Systems, vol. 12079, Springer Nature, 2020, pp. 79–97, doi:10.1007/978-3-030-45237-7_5. short: M. Giacobbe, T.A. Henzinger, M. Lechner, in:, International Conference on Tools and Algorithms for the Construction and Analysis of Systems, Springer Nature, 2020, pp. 79–97. conference: end_date: 2020-04-30 location: Dublin, Ireland name: 'TACAS: Tools and Algorithms for the Construction and Analysis of Systems' start_date: 2020-04-25 date_created: 2020-05-10T22:00:49Z date_published: 2020-04-17T00:00:00Z date_updated: 2023-06-23T07:01:11Z day: '17' ddc: - '000' department: - _id: ToHe doi: 10.1007/978-3-030-45237-7_5 file: - access_level: open_access checksum: f19905a42891fe5ce93d69143fa3f6fb content_type: application/pdf creator: dernst date_created: 2020-05-26T12:48:15Z date_updated: 2020-07-14T12:48:03Z file_id: '7893' file_name: 2020_TACAS_Giacobbe.pdf file_size: 2744030 relation: main_file file_date_updated: 2020-07-14T12:48:03Z has_accepted_license: '1' intvolume: ' 12079' language: - iso: eng month: '04' oa: 1 oa_version: Published Version page: 79-97 project: - _id: 25832EC2-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: S 11407_N23 name: Rigorous Systems Engineering - _id: 25F42A32-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: Z211 name: The Wittgenstein Prize publication: International Conference on Tools and Algorithms for the Construction and Analysis of Systems publication_identifier: eissn: - '16113349' isbn: - '9783030452360' issn: - '03029743' publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: record: - id: '11362' relation: dissertation_contains status: public scopus_import: 1 status: public title: How many bits does it take to quantize your neural network? 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: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 12079 year: '2020' ... --- _id: '7952' abstract: - lang: eng text: "Isomanifolds are the generalization of isosurfaces to arbitrary dimension and codimension, i.e. manifolds defined as the zero set of some multivariate vector-valued smooth function f: ℝ^d → ℝ^(d-n). A natural (and efficient) way to approximate an isomanifold is to consider its Piecewise-Linear (PL) approximation based on a triangulation \U0001D4AF of the ambient space ℝ^d. In this paper, we give conditions under which the PL-approximation of an isomanifold is topologically equivalent to the isomanifold. The conditions are easy to satisfy in the sense that they can always be met by taking a sufficiently fine triangulation \U0001D4AF. This contrasts with previous results on the triangulation of manifolds where, in arbitrary dimensions, delicate perturbations are needed to guarantee topological correctness, which leads to strong limitations in practice. We further give a bound on the Fréchet distance between the original isomanifold and its PL-approximation. Finally we show analogous results for the PL-approximation of an isomanifold with boundary. " alternative_title: - LIPIcs article_number: 20:1-20:18 article_processing_charge: No author: - first_name: Jean-Daniel full_name: Boissonnat, Jean-Daniel last_name: Boissonnat - first_name: Mathijs full_name: Wintraecken, Mathijs id: 307CFBC8-F248-11E8-B48F-1D18A9856A87 last_name: Wintraecken orcid: 0000-0002-7472-2220 citation: ama: 'Boissonnat J-D, Wintraecken M. The topological correctness of PL-approximations of isomanifolds. In: 36th International Symposium on Computational Geometry. Vol 164. Schloss Dagstuhl - Leibniz-Zentrum für Informatik; 2020. doi:10.4230/LIPIcs.SoCG.2020.20' apa: 'Boissonnat, J.-D., & Wintraecken, M. (2020). The topological correctness of PL-approximations of isomanifolds. In 36th International Symposium on Computational Geometry (Vol. 164). Zürich, Switzerland: Schloss Dagstuhl - Leibniz-Zentrum für Informatik. https://doi.org/10.4230/LIPIcs.SoCG.2020.20' chicago: Boissonnat, Jean-Daniel, and Mathijs Wintraecken. “The Topological Correctness of PL-Approximations of Isomanifolds.” In 36th International Symposium on Computational Geometry, Vol. 164. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020. https://doi.org/10.4230/LIPIcs.SoCG.2020.20. ieee: J.-D. Boissonnat and M. Wintraecken, “The topological correctness of PL-approximations of isomanifolds,” in 36th International Symposium on Computational Geometry, Zürich, Switzerland, 2020, vol. 164. ista: 'Boissonnat J-D, Wintraecken M. 2020. The topological correctness of PL-approximations of isomanifolds. 36th International Symposium on Computational Geometry. SoCG: Symposium on Computational Geometry, LIPIcs, vol. 164, 20:1-20:18.' mla: Boissonnat, Jean-Daniel, and Mathijs Wintraecken. “The Topological Correctness of PL-Approximations of Isomanifolds.” 36th International Symposium on Computational Geometry, vol. 164, 20:1-20:18, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020, doi:10.4230/LIPIcs.SoCG.2020.20. short: J.-D. Boissonnat, M. Wintraecken, in:, 36th International Symposium on Computational Geometry, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020. conference: end_date: 2020-06-26 location: Zürich, Switzerland name: 'SoCG: Symposium on Computational Geometry' start_date: 2020-06-22 date_created: 2020-06-09T07:24:11Z date_published: 2020-06-01T00:00:00Z date_updated: 2023-08-02T06:49:16Z day: '01' ddc: - '510' department: - _id: HeEd doi: 10.4230/LIPIcs.SoCG.2020.20 ec_funded: 1 file: - access_level: open_access checksum: 38cbfa4f5d484d267a35d44d210df044 content_type: application/pdf creator: dernst date_created: 2020-06-17T10:13:34Z date_updated: 2020-07-14T12:48:06Z file_id: '7969' file_name: 2020_LIPIcsSoCG_Boissonnat.pdf file_size: 1009739 relation: main_file file_date_updated: 2020-07-14T12:48:06Z has_accepted_license: '1' intvolume: ' 164' language: - iso: eng month: '06' oa: 1 oa_version: Published Version project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: 36th International Symposium on Computational Geometry publication_identifier: isbn: - 978-3-95977-143-6 issn: - 1868-8969 publication_status: published publisher: Schloss Dagstuhl - Leibniz-Zentrum für Informatik quality_controlled: '1' related_material: record: - id: '9649' relation: later_version status: public scopus_import: '1' status: public title: The topological correctness of PL-approximations of isomanifolds 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: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 164 year: '2020' ... --- _id: '7990' abstract: - lang: eng text: 'Given a finite point set P in general position in the plane, a full triangulation is a maximal straight-line embedded plane graph on P. A partial triangulation on P is a full triangulation of some subset P'' of P containing all extreme points in P. A bistellar flip on a partial triangulation either flips an edge, removes a non-extreme point of degree 3, or adds a point in P ⧵ P'' as vertex of degree 3. The bistellar flip graph has all partial triangulations as vertices, and a pair of partial triangulations is adjacent if they can be obtained from one another by a bistellar flip. The goal of this paper is to investigate the structure of this graph, with emphasis on its connectivity. For sets P of n points in general position, we show that the bistellar flip graph is (n-3)-connected, thereby answering, for sets in general position, an open questions raised in a book (by De Loera, Rambau, and Santos) and a survey (by Lee and Santos) on triangulations. This matches the situation for the subfamily of regular triangulations (i.e., partial triangulations obtained by lifting the points and projecting the lower convex hull), where (n-3)-connectivity has been known since the late 1980s through the secondary polytope (Gelfand, Kapranov, Zelevinsky) and Balinski’s Theorem. Our methods also yield the following results (see the full version [Wagner and Welzl, 2020]): (i) The bistellar flip graph can be covered by graphs of polytopes of dimension n-3 (products of secondary polytopes). (ii) A partial triangulation is regular, if it has distance n-3 in the Hasse diagram of the partial order of partial subdivisions from the trivial subdivision. (iii) All partial triangulations are regular iff the trivial subdivision has height n-3 in the partial order of partial subdivisions. (iv) There are arbitrarily large sets P with non-regular partial triangulations, while every proper subset has only regular triangulations, i.e., there are no small certificates for the existence of non-regular partial triangulations (answering a question by F. Santos in the unexpected direction).' alternative_title: - LIPIcs article_number: 67:1 - 67:16 article_processing_charge: No author: - first_name: Uli full_name: Wagner, Uli id: 36690CA2-F248-11E8-B48F-1D18A9856A87 last_name: Wagner orcid: 0000-0002-1494-0568 - first_name: Emo full_name: Welzl, Emo last_name: Welzl citation: ama: 'Wagner U, Welzl E. Connectivity of triangulation flip graphs in the plane (Part II: Bistellar flips). In: 36th International Symposium on Computational Geometry. Vol 164. Schloss Dagstuhl - Leibniz-Zentrum für Informatik; 2020. doi:10.4230/LIPIcs.SoCG.2020.67' apa: 'Wagner, U., & Welzl, E. (2020). Connectivity of triangulation flip graphs in the plane (Part II: Bistellar flips). In 36th International Symposium on Computational Geometry (Vol. 164). Zürich, Switzerland: Schloss Dagstuhl - Leibniz-Zentrum für Informatik. https://doi.org/10.4230/LIPIcs.SoCG.2020.67' chicago: 'Wagner, Uli, and Emo Welzl. “Connectivity of Triangulation Flip Graphs in the Plane (Part II: Bistellar Flips).” In 36th International Symposium on Computational Geometry, Vol. 164. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020. https://doi.org/10.4230/LIPIcs.SoCG.2020.67.' ieee: 'U. Wagner and E. Welzl, “Connectivity of triangulation flip graphs in the plane (Part II: Bistellar flips),” in 36th International Symposium on Computational Geometry, Zürich, Switzerland, 2020, vol. 164.' ista: 'Wagner U, Welzl E. 2020. Connectivity of triangulation flip graphs in the plane (Part II: Bistellar flips). 36th International Symposium on Computational Geometry. SoCG: Symposium on Computational Geometry, LIPIcs, vol. 164, 67:1-67:16.' mla: 'Wagner, Uli, and Emo Welzl. “Connectivity of Triangulation Flip Graphs in the Plane (Part II: Bistellar Flips).” 36th International Symposium on Computational Geometry, vol. 164, 67:1-67:16, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020, doi:10.4230/LIPIcs.SoCG.2020.67.' short: U. Wagner, E. Welzl, in:, 36th International Symposium on Computational Geometry, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020. conference: end_date: 2020-06-26 location: Zürich, Switzerland name: 'SoCG: Symposium on Computational Geometry' start_date: 2020-06-22 date_created: 2020-06-22T09:14:19Z date_published: 2020-06-01T00:00:00Z date_updated: 2023-08-04T08:51:07Z day: '01' ddc: - '510' department: - _id: UlWa doi: 10.4230/LIPIcs.SoCG.2020.67 external_id: arxiv: - '2003.13557' file: - access_level: open_access checksum: 3f6925be5f3dcdb3b14cab92f410edf7 content_type: application/pdf creator: dernst date_created: 2020-06-23T06:37:27Z date_updated: 2020-07-14T12:48:06Z file_id: '8003' file_name: 2020_LIPIcsSoCG_Wagner.pdf file_size: 793187 relation: main_file file_date_updated: 2020-07-14T12:48:06Z has_accepted_license: '1' intvolume: ' 164' language: - iso: eng month: '06' oa: 1 oa_version: Published Version publication: 36th International Symposium on Computational Geometry publication_identifier: isbn: - '9783959771436' issn: - '18688969' publication_status: published publisher: Schloss Dagstuhl - Leibniz-Zentrum für Informatik quality_controlled: '1' related_material: record: - id: '12129' relation: later_version status: public scopus_import: 1 status: public title: 'Connectivity of triangulation flip graphs in the plane (Part II: Bistellar flips)' 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: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 164 year: '2020' ... --- _id: '7807' abstract: - lang: eng text: "In a straight-line embedded triangulation of a point set P in the plane, removing an inner edge and—provided the resulting quadrilateral is convex—adding the other diagonal is called an edge flip. The (edge) flip graph has all triangulations as vertices, and a pair of triangulations is adjacent if they can be obtained from each other by an edge flip. The goal of this paper is to contribute to a better understanding of the flip graph, with an emphasis on its connectivity.\r\nFor sets in general position, it is known that every triangulation allows at least edge flips (a tight bound) which gives the minimum degree of any flip graph for n points. We show that for every point set P in general position, the flip graph is at least -vertex connected. Somewhat more strongly, we show that the vertex connectivity equals the minimum degree occurring in the flip graph, i.e. the minimum number of flippable edges in any triangulation of P, provided P is large enough. Finally, we exhibit some of the geometry of the flip graph by showing that the flip graph can be covered by 1-skeletons of polytopes of dimension (products of associahedra).\r\nA corresponding result ((n – 3)-vertex connectedness) can be shown for the bistellar flip graph of partial triangulations, i.e. the set of all triangulations of subsets of P which contain all extreme points of P. This will be treated separately in a second part." article_processing_charge: No author: - first_name: Uli full_name: Wagner, Uli id: 36690CA2-F248-11E8-B48F-1D18A9856A87 last_name: Wagner orcid: 0000-0002-1494-0568 - first_name: Emo full_name: Welzl, Emo last_name: Welzl citation: ama: 'Wagner U, Welzl E. Connectivity of triangulation flip graphs in the plane (Part I: Edge flips). In: Proceedings of the Annual ACM-SIAM Symposium on Discrete Algorithms. Vol 2020-January. SIAM; 2020:2823-2841. doi:10.1137/1.9781611975994.172' apa: 'Wagner, U., & Welzl, E. (2020). Connectivity of triangulation flip graphs in the plane (Part I: Edge flips). In Proceedings of the Annual ACM-SIAM Symposium on Discrete Algorithms (Vol. 2020–January, pp. 2823–2841). Salt Lake City, UT, United States: SIAM. https://doi.org/10.1137/1.9781611975994.172' chicago: 'Wagner, Uli, and Emo Welzl. “Connectivity of Triangulation Flip Graphs in the Plane (Part I: Edge Flips).” In Proceedings of the Annual ACM-SIAM Symposium on Discrete Algorithms, 2020–January:2823–41. SIAM, 2020. https://doi.org/10.1137/1.9781611975994.172.' ieee: 'U. Wagner and E. Welzl, “Connectivity of triangulation flip graphs in the plane (Part I: Edge flips),” in Proceedings of the Annual ACM-SIAM Symposium on Discrete Algorithms, Salt Lake City, UT, United States, 2020, vol. 2020–January, pp. 2823–2841.' ista: 'Wagner U, Welzl E. 2020. Connectivity of triangulation flip graphs in the plane (Part I: Edge flips). Proceedings of the Annual ACM-SIAM Symposium on Discrete Algorithms. SODA: Symposium on Discrete Algorithms vol. 2020–January, 2823–2841.' mla: 'Wagner, Uli, and Emo Welzl. “Connectivity of Triangulation Flip Graphs in the Plane (Part I: Edge Flips).” Proceedings of the Annual ACM-SIAM Symposium on Discrete Algorithms, vol. 2020–January, SIAM, 2020, pp. 2823–41, doi:10.1137/1.9781611975994.172.' short: U. Wagner, E. Welzl, in:, Proceedings of the Annual ACM-SIAM Symposium on Discrete Algorithms, SIAM, 2020, pp. 2823–2841. conference: end_date: 2020-01-08 location: Salt Lake City, UT, United States name: 'SODA: Symposium on Discrete Algorithms' start_date: 2020-01-05 date_created: 2020-05-10T22:00:48Z date_published: 2020-01-01T00:00:00Z date_updated: 2023-08-04T08:51:07Z day: '01' department: - _id: UlWa doi: 10.1137/1.9781611975994.172 external_id: arxiv: - '2003.13557' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1137/1.9781611975994.172 month: '01' oa: 1 oa_version: Submitted Version page: 2823-2841 publication: Proceedings of the Annual ACM-SIAM Symposium on Discrete Algorithms publication_identifier: isbn: - '9781611975994' publication_status: published publisher: SIAM quality_controlled: '1' related_material: record: - id: '12129' relation: later_version status: public scopus_import: 1 status: public title: 'Connectivity of triangulation flip graphs in the plane (Part I: Edge flips)' type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 2020-January year: '2020' ... --- _id: '13073' abstract: - lang: eng text: The Mytilus complex of marine mussel species forms a mosaic of hybrid zones, found across temperate regions of the globe. This allows us to study "replicated" instances of secondary contact between closely-related species. Previous work on this complex has shown that local introgression is both widespread and highly heterogeneous, and has identified SNPs that are outliers of differentiation between lineages. Here, we developed an ancestry-informative panel of such SNPs. We then compared their frequencies in newly-sampled populations, including samples from within the hybrid zones, and parental populations at different distances from the contact. Results show that close to the hybrid zones, some outlier loci are near to fixation for the heterospecific allele, suggesting enhanced local introgression, or the local sweep of a shared ancestral allele. Conversely, genomic cline analyses, treating local parental populations as the reference, reveal a globally high concordance among loci, albeit with a few signals of asymmetric introgression. Enhanced local introgression at specific loci is consistent with the early transfer of adaptive variants after contact, possibly including asymmetric bi-stable variants (Dobzhansky-Muller incompatibilities), or haplotypes loaded with fewer deleterious mutations. Having escaped one barrier, however, these variants can be trapped or delayed at the next barrier, confining the introgression locally. These results shed light on the decay of species barriers during phases of contact. article_processing_charge: No author: - first_name: Alexis full_name: Simon, Alexis last_name: Simon - first_name: Christelle full_name: Fraisse, Christelle id: 32DF5794-F248-11E8-B48F-1D18A9856A87 last_name: Fraisse orcid: 0000-0001-8441-5075 - first_name: Tahani full_name: El Ayari, Tahani last_name: El Ayari - first_name: Cathy full_name: Liautard-Haag, Cathy last_name: Liautard-Haag - first_name: Petr full_name: Strelkov, Petr last_name: Strelkov - first_name: John full_name: Welch, John last_name: Welch - first_name: Nicolas full_name: Bierne, Nicolas last_name: Bierne citation: ama: Simon A, Fraisse C, El Ayari T, et al. How do species barriers decay? concordance and local introgression in mosaic hybrid zones of mussels. 2020. doi:10.5061/DRYAD.R4XGXD29N apa: Simon, A., Fraisse, C., El Ayari, T., Liautard-Haag, C., Strelkov, P., Welch, J., & Bierne, N. (2020). How do species barriers decay? concordance and local introgression in mosaic hybrid zones of mussels. Dryad. https://doi.org/10.5061/DRYAD.R4XGXD29N chicago: Simon, Alexis, Christelle Fraisse, Tahani El Ayari, Cathy Liautard-Haag, Petr Strelkov, John Welch, and Nicolas Bierne. “How Do Species Barriers Decay? Concordance and Local Introgression in Mosaic Hybrid Zones of Mussels.” Dryad, 2020. https://doi.org/10.5061/DRYAD.R4XGXD29N. ieee: A. Simon et al., “How do species barriers decay? concordance and local introgression in mosaic hybrid zones of mussels.” Dryad, 2020. ista: Simon A, Fraisse C, El Ayari T, Liautard-Haag C, Strelkov P, Welch J, Bierne N. 2020. How do species barriers decay? concordance and local introgression in mosaic hybrid zones of mussels, Dryad, 10.5061/DRYAD.R4XGXD29N. mla: Simon, Alexis, et al. How Do Species Barriers Decay? Concordance and Local Introgression in Mosaic Hybrid Zones of Mussels. Dryad, 2020, doi:10.5061/DRYAD.R4XGXD29N. short: A. Simon, C. Fraisse, T. El Ayari, C. Liautard-Haag, P. Strelkov, J. Welch, N. Bierne, (2020). date_created: 2023-05-23T16:48:27Z date_published: 2020-09-22T00:00:00Z date_updated: 2023-08-04T11:04:11Z day: '22' ddc: - '570' department: - _id: NiBa doi: 10.5061/DRYAD.R4XGXD29N main_file_link: - open_access: '1' url: https://doi.org/10.5061/dryad.r4xgxd29n month: '09' oa: 1 oa_version: Published Version publisher: Dryad related_material: record: - id: '8708' relation: used_in_publication status: public status: public title: How do species barriers decay? concordance and local introgression in mosaic hybrid zones of mussels tmp: image: /images/cc_0.png legal_code_url: https://creativecommons.org/publicdomain/zero/1.0/legalcode name: Creative Commons Public Domain Dedication (CC0 1.0) short: CC0 (1.0) type: research_data_reference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2020' ... --- _id: '13065' abstract: - lang: eng text: Domestication is a human-induced selection process that imprints the genomes of domesticated populations over a short evolutionary time scale, and that occurs in a given demographic context. Reconstructing historical gene flow, effective population size changes and their timing is therefore of fundamental interest to understand how plant demography and human selection jointly shape genomic divergence during domestication. Yet, the comparison under a single statistical framework of independent domestication histories across different crop species has been little evaluated so far. Thus, it is unclear whether domestication leads to convergent demographic changes that similarly affect crop genomes. To address this question, we used existing and new transcriptome data on three crop species of Solanaceae (eggplant, pepper and tomato), together with their close wild relatives. We fitted twelve demographic models of increasing complexity on the unfolded joint allele frequency spectrum for each wild/crop pair, and we found evidence for both shared and species-specific demographic processes between species. A convergent history of domestication with gene-flow was inferred for all three species, along with evidence of strong reduction in the effective population size during the cultivation stage of tomato and pepper. The absence of any reduction in size of the crop in eggplant stands out from the classical view of the domestication process; as does the existence of a “protracted period” of management before cultivation. Our results also suggest divergent management strategies of modern cultivars among species as their current demography substantially differs. Finally, the timing of domestication is species-specific and supported by the few historical records available. article_processing_charge: No author: - first_name: Stephanie full_name: Arnoux, Stephanie last_name: Arnoux - first_name: Christelle full_name: Fraisse, Christelle id: 32DF5794-F248-11E8-B48F-1D18A9856A87 last_name: Fraisse orcid: 0000-0001-8441-5075 - first_name: Christopher full_name: Sauvage, Christopher last_name: Sauvage citation: ama: 'Arnoux S, Fraisse C, Sauvage C. VCF files of synonymous SNPs related to: Genomic inference of complex domestication histories in three Solanaceae species. 2020. doi:10.5061/DRYAD.Q2BVQ83HD' apa: 'Arnoux, S., Fraisse, C., & Sauvage, C. (2020). VCF files of synonymous SNPs related to: Genomic inference of complex domestication histories in three Solanaceae species. Dryad. https://doi.org/10.5061/DRYAD.Q2BVQ83HD' chicago: 'Arnoux, Stephanie, Christelle Fraisse, and Christopher Sauvage. “VCF Files of Synonymous SNPs Related to: Genomic Inference of Complex Domestication Histories in Three Solanaceae Species.” Dryad, 2020. https://doi.org/10.5061/DRYAD.Q2BVQ83HD.' ieee: 'S. Arnoux, C. Fraisse, and C. Sauvage, “VCF files of synonymous SNPs related to: Genomic inference of complex domestication histories in three Solanaceae species.” Dryad, 2020.' ista: 'Arnoux S, Fraisse C, Sauvage C. 2020. VCF files of synonymous SNPs related to: Genomic inference of complex domestication histories in three Solanaceae species, Dryad, 10.5061/DRYAD.Q2BVQ83HD.' mla: 'Arnoux, Stephanie, et al. VCF Files of Synonymous SNPs Related to: Genomic Inference of Complex Domestication Histories in Three Solanaceae Species. Dryad, 2020, doi:10.5061/DRYAD.Q2BVQ83HD.' short: S. Arnoux, C. Fraisse, C. Sauvage, (2020). date_created: 2023-05-23T16:30:20Z date_published: 2020-10-19T00:00:00Z date_updated: 2023-08-04T11:19:26Z day: '19' ddc: - '570' department: - _id: NiBa doi: 10.5061/DRYAD.Q2BVQ83HD main_file_link: - open_access: '1' url: https://doi.org/10.5061/dryad.q2bvq83hd month: '10' oa: 1 oa_version: Published Version publisher: Dryad related_material: link: - relation: software url: https://github.com/starnoux/arnoux_et_al_2019 record: - id: '8928' relation: used_in_publication status: public status: public title: 'VCF files of synonymous SNPs related to: Genomic inference of complex domestication histories in three Solanaceae species' tmp: image: /images/cc_0.png legal_code_url: https://creativecommons.org/publicdomain/zero/1.0/legalcode name: Creative Commons Public Domain Dedication (CC0 1.0) short: CC0 (1.0) type: research_data_reference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2020' ... --- _id: '8536' abstract: - lang: eng text: This work analyzes the latency of the simplified successive cancellation (SSC) decoding scheme for polar codes proposed by Alamdar-Yazdi and Kschischang. It is shown that, unlike conventional successive cancellation decoding, where latency is linear in the block length, the latency of SSC decoding is sublinear. More specifically, the latency of SSC decoding is O(N 1−1/µ ), where N is the block length and µ is the scaling exponent of the channel, which captures the speed of convergence of the rate to capacity. Numerical results demonstrate the tightness of the bound and show that most of the latency reduction arises from the parallel decoding of subcodes of rate 0 and 1. acknowledgement: M. Mondelli was partially supported by grants NSF DMS-1613091, CCF-1714305, IIS-1741162 and ONR N00014-18-1-2729. S. A. Hashemi is supported by a Postdoctoral Fellowship from the Natural Sciences and Engineering Research Council of Canada (NSERC) and by Huawei. article_number: 401-406 article_processing_charge: No author: - first_name: Marco full_name: Mondelli, Marco id: 27EB676C-8706-11E9-9510-7717E6697425 last_name: Mondelli orcid: 0000-0002-3242-7020 - first_name: Seyyed Ali full_name: Hashemi, Seyyed Ali last_name: Hashemi - first_name: John full_name: Cioffi, John last_name: Cioffi - first_name: Andrea full_name: Goldsmith, Andrea last_name: Goldsmith citation: ama: 'Mondelli M, Hashemi SA, Cioffi J, Goldsmith A. Simplified successive cancellation decoding of polar codes has sublinear latency. In: IEEE International Symposium on Information Theory - Proceedings. Vol 2020-June. IEEE; 2020. doi:10.1109/ISIT44484.2020.9174141' apa: 'Mondelli, M., Hashemi, S. A., Cioffi, J., & Goldsmith, A. (2020). Simplified successive cancellation decoding of polar codes has sublinear latency. In IEEE International Symposium on Information Theory - Proceedings (Vol. 2020–June). Los Angeles, CA, United States: IEEE. https://doi.org/10.1109/ISIT44484.2020.9174141' chicago: Mondelli, Marco, Seyyed Ali Hashemi, John Cioffi, and Andrea Goldsmith. “Simplified Successive Cancellation Decoding of Polar Codes Has Sublinear Latency.” In IEEE International Symposium on Information Theory - Proceedings, Vol. 2020–June. IEEE, 2020. https://doi.org/10.1109/ISIT44484.2020.9174141. ieee: M. Mondelli, S. A. Hashemi, J. Cioffi, and A. Goldsmith, “Simplified successive cancellation decoding of polar codes has sublinear latency,” in IEEE International Symposium on Information Theory - Proceedings, Los Angeles, CA, United States, 2020, vol. 2020–June. ista: 'Mondelli M, Hashemi SA, Cioffi J, Goldsmith A. 2020. Simplified successive cancellation decoding of polar codes has sublinear latency. IEEE International Symposium on Information Theory - Proceedings. ISIT: Internation Symposium on Information Theory vol. 2020–June, 401–406.' mla: Mondelli, Marco, et al. “Simplified Successive Cancellation Decoding of Polar Codes Has Sublinear Latency.” IEEE International Symposium on Information Theory - Proceedings, vol. 2020–June, 401–406, IEEE, 2020, doi:10.1109/ISIT44484.2020.9174141. short: M. Mondelli, S.A. Hashemi, J. Cioffi, A. Goldsmith, in:, IEEE International Symposium on Information Theory - Proceedings, IEEE, 2020. conference: end_date: 2020-06-26 location: Los Angeles, CA, United States name: 'ISIT: Internation Symposium on Information Theory' start_date: 2020-06-21 date_created: 2020-09-20T22:01:37Z date_published: 2020-06-01T00:00:00Z date_updated: 2023-08-07T13:36:24Z day: '01' department: - _id: MaMo doi: 10.1109/ISIT44484.2020.9174141 external_id: arxiv: - '1909.04892' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1909.04892 month: '06' oa: 1 oa_version: Preprint publication: IEEE International Symposium on Information Theory - Proceedings publication_identifier: isbn: - '9781728164328' issn: - '21578095' publication_status: published publisher: IEEE quality_controlled: '1' related_material: record: - id: '9047' relation: later_version status: public scopus_import: '1' status: public title: Simplified successive cancellation decoding of polar codes has sublinear latency type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 2020-June year: '2020' ...