2022-05-09 10:00 — 11:00 FAMNIT-MP1 Safet Penjić (UP IAM, Slovenia) A unified view of inequalities for distance-regular graphs In this talk, we introduce the language of a configuration and of t-point counts for distance-regular graphs (DRGs). Every t-point count can…
2022-05-04 10:00 — 11:00 ZOOM Jelena Radović (University of Novi Sad, Serbia) Higher commutators in semigroups with zero A group is nilpotent if it has a finite central series. In universal algebra we have two generalizations of the notion of…
10:00 — 11:00 Avla Glagoljaška – Famnit Kenny Štorgel ((UP FAMNIT and UNM FIS)) Further Extensions of the Grötzsch Theorem Hoang La, Borut Lužar, Kenny Štorgel The Grötzsch Theorem states that every triangle-free planar graph G admits a proper 3-coloring,…
2022-04-11 10:00 — 11:00 FAMNIT-MP1 Uéverton Souza (Universidade Federal Fluminense, Brazil) Co-degeneracy and Bondy and Chvátal closures: Using the complement to solve problems on dense graphs In 1976, Bondy and Chvátal [Discrete Math. 1976] introduced the notion of closure of…
2022-04-04 10:00 — 11:00 FAMNIT-MP1 Amar Bapić (UP FAMNIT, Slovenia) Two “new” superclasses of bent functions outside M# During the talk, we give a short introduction to some basic definitions and notions regarding (vectorial) bent functions, which have been extensively…
2022-03-28 10:00 — 11:00 FAMNIT-MP1 Nicolas Trotignon (CNRS, Lyon, France) Minors vs induced subgraphs During the talk, we give a short introduction to the graph minor project of Robertson and Seymour, that is a series of twenty papers that runs…
2022-03-21 10:00 — 11:00 FAMNIT-MP1 Ademir Hujdurović (UP FAMNIT, Slovenia) Erdős-Ko-Rado type theorems for permutation groups The Erdős-Ko-Rado theorem is one of the central results in extremal combinatorics. It gives a bound on the size of a family of…
2022-03-07 10:00 — 11:00 ZOOM Nina Klobas (Durham University) Temporal Graphs Temporal graphs are graphs with a fixed vertex set and a set of edges that changes over time. This paradigm reflects the structure and operation of a great variety…
2022-02-21 10:00 — 11:00 FAMNIT-MP1 & ZOOM Edin Husić (The Swiss AI lab IDSIA, Lugano, Switzerland) On complete classes of valuated matroids Valuated matroids were introduced by Dress and Wenzel in 1992 as a valuated generalization of matroids. They are a…
2022-02-17 10:00 — 11:00 ZOOM Hassan Cheraghpour (University of Kurdistan, Iran) On the idempotents, nilpotents, units and zero-divisors of finite rings In this talk, first we find the number of idempotents, nilpotents and the zero-divisors of a matrix ring…