2022-12-19 15:00 — 16:00 FAMNIT-MP1 Bojan Kuzma (UP FAMNIT, Slovenia) Additive spectrum preservers on unbounded operators. The spectrum of unbounded operators, typically acting in a complex Hilbert space, plays a vital role in diverse topics such as (i) mathematical formulation…
2022-12-05 15:00 — 16:00 FAMNIT-MP1 Ivan Damnjanović (University of Niš, Serbia) Resolution of the circulant nut graph order–degree existence problem A circulant nut graph is a non-trivial simple graph such that its adjacency matrix is a circulant matrix whose null…
2022-12-12 15:00 — 16:00 FAMNIT-MP1 Francesca Gandini (UP FAMNIT, Slovenia) Degree bounds for invariant skew polynomials When we consider the linear action of a finite group on a polynomial ring, an invariant is a polynomial unchanged by the action. A…
2022-11-28 15:00 — 16:00 FAMNIT-MP1 Ted Dobson (UP FAMNIT, Slovenia) A refinement of Wielandt’s k-closed hierarchy of permutation groups with applications to algebraic graph theory Let $k\ge 1$ be an integer. In the 1960’s, Helmut Wielandt introduced the notion of…
2022-11-14 15:00 — 16:00 FAMNIT-MP1 Antonio Montero (University of Ljubljana, Slovenia) Voltage operations on maps, polytopes and maniplexes Geometrical operations such as truncation, duality, Petrie-duality, among others, arise naturally in the study of highly symmetric convex polyhedra. Often these operations…
2022-10-24 10:00 — 11:00 FAMNIT-MP1 ALESSANDRO LINZI (University of Nova Gorica, Slovenia) Quantifier elimination for henselian valued fields relative to the associated Krasner hyperfields The model theory of valued fields has been extensively studied after, in 1965, the work of…
2022-10-17 15:00 — 16:00 Famnit MP1 Marko Orel (UP FAMNIT) Some properties of complementary prisms Given a finite simple graph on n vertices, its complementary prism is a graph on 2n vertices, which is obtained from the disjoint union of…
2022-10-10 15:00 — 16:00 Famnit MP1 Boštjan Brešar (University of Maribor, Slovenia) Domination and total domination in digraphs While domination in (undirected) graphs is one of the most investigated topics in graph theory, domination in digraphs has been studied much…
2022-10-03 15:00 — 16:00 Famnit MP1 Russ Woodroofe (UP FAMNIT) The extensible No-Three-In-Line problem The classical No-Three-In-Line asks for the largest set of lattice points in the n by n grid that lie in general position; that is, so that…
2022-09-08 14:00 — 15:00 FAMNIT-VP1 Michel Lavrauw (Sabanci University, Turkey) Nets of conics over finite fields A conic in a projective plane is the zero locus of a quadratic form in F[X, Y, Z]. Linear systems of conics are subspaces…
