2016-04-11 10:00-11:00 FAMNIT-POŠTA Matjaž Krnc (UP FAMNIT, UP IAM) Kronecker covers and generalized Petersen graphs The family of generalized Petersen graphs G(n,k), introduced by Coxter et al. (1950) and named by Mark Watkins (1969), is a family of cubic graphs…
2016-04-04 10:00-11:00 FAMNIT-POŠTA Nastja Cepak (UP IAM, UP FAMNIT) Permutations via linear translators We show that many infinite classes of permutations over finite fields can be constructed via translators with a large choice of parameters. We characterize some functions having…
2016-03-21 10:00-11:00 FAMNIT-POŠTA Fabio Vlacci (University of Florence, Italy) Discrete Actions over the Hyperbolic Quaternionic Space In this talk we’ll describe some properties of certain discrete subgroups of quaternionic matrices acting in the hyperbolic quaternionic space which are similar to…
2016-03-14 10:00-11:00 FAMNIT-POŠTA Sanja Rukavina (University of Rijeka) Self-dual codes from extended orbit matrices of symmetric designs We study codes spanned by the rows of an orbit matrix of a symmetric design with respect to an automorphism group that acts…
2016-03-07 10:00-11:00 FAMNIT-POŠTA Tatiana Romina Hartinger (UP IAM, UP FAMNIT) 1-perfectly orientable graphs and graph products A graph G is said to be 1-perfectly orientable (1-p.o. for short) if it admits an orientation such that the out-neighborhood of every vertex…
2016-02-29 10:00-11:00 FAMNIT-POŠTA Safet Penjić (UP IAM) On the Terwilliger algebra of bipartite distance-regular graphs with \Delta_2=0 and c_2=2 Let \Gamma denote a bipartite distance-regular graph with diameter D \ge 4 and valency k \ge 4. Let X denote the…
2016-02-22 10:00-11:00 FAMNIT-POŠTA Janoš Vidali (University of Ljubljana) DiscreteZOO – a repository of graphs and its companion Sage package DiscreteZOO is a project combining a central repository of graphs, its website front-end and extensions for software packages like Sage. The…
2016-01-18 10:00-11:00 FAMNIT-POŠTA Bojan Kuzma (UP FAMNIT) Some problems from recent IMAGE We will present solutions to several problems published in recent volume of ILAS publication IMAGE. Problems are intended to popularize the field of Linear algebra.
2016-01-11 10:00-11:00 FAMNIT-POŠTA Tomaž Pisanski (University of Primorska, Slovenia) Operations on maniplexes and oriented maniplexes In the past we have been using flag graphs and symmetry type graphs for studying certain operations on maps and their symmetries, such as truncation,…
2016-01-04 10:00-11:00 FAMNIT-POŠTA Gordon Williams (University of Alaska Fairbanks, USA) Monodromy groups and regular covers of abstract polytopes The objective of this talk is to provide an introduction to several open problems about the monodromy groups of abstract polytopes and…