TY - JOUR AB - We give explicit formulas and algorithms for the computation of the Thurston–Bennequin invariant of a nullhomologous Legendrian knot on a page of a contact open book and on Heegaard surfaces in convex position. Furthermore, we extend the results to rationally nullhomologous knots in arbitrary 3-manifolds. AU - Durst, Sebastian AU - Kegel, Marc AU - Klukas, Mirko D ID - 1292 IS - 2 JF - Acta Mathematica Hungarica TI - Computing the Thurston–Bennequin invariant in open books VL - 150 ER -