2015-10-19 10:00 – 11:00 FAMNIT-POSTA Dragan Marušič (UP FAMNIT, UP IAM) Odd automorphisms An automorphism (or symmetry) of a combinatorial graph may be called even or odd according to whether it acts as an even or odd permutation on the…
2015-10-12 10:00-11:00 FAMNIT-POSTA Stephen E. Wilson (UP IAM, UP FAMNIT) Operartors on Maniplexes (Part II) ‘Maniplex’ is a generalization of ‘polytope’ and is at the same time a generalization of ‘map’. We are interested in those which have large symmetry…
2015-10-05 10:00-11:00 FAMNIT-POSTA Stephen E. Wilson (UP IAM, UP FAMNIT) Operartors on Maniplexes ‘Maniplex’ is a generalization of ‘polytope’ and is at the same time a generalization of ‘map’. We are interested in those which have large symmetry groups, and…
2015-06-12 10:00-11:00 FAMNIT-MP1 Plamen Vladkov Mirazchiyski (International Association for the Evaluation of Educational Achievement (Germany)) The international large-scale student assessments (ILSA) The international large-scale student assessments (ILSA) are on the scene of educational research for more than 50 years. Their…
2015-05-25 10:00-11:00 FAMNIT-POSTA Matija Vidmar (University of Ljubljana) On the informational structure in optimal dynamic stochastic control We formulate a massively general framework for optimal dynamic stochastic control problems which allows for a control-dependent informational structure. The issue of informational…
2015-05-18 10:00-11:00 FAMNIT-POSTA Robert Jajcay (Comenius University (Slovakia) and UP FAMNIT) Combinatorial structures with regular automorphism groups The topic of our talk is a refinement of the classical result of Frucht, who has shown that for any finite group G,…
2015-05-11 10:00-11:00 FAMNIT-POSTA Marco Buratti (Universita di Perugia, Italy) Hamiltonian cycle systems and their automorphism groups A Hamiltonian cycle system of odd (even) order v, briefly a HCS(v), is a decomposition of the complete graph Kv (the complete graph Kv…
2015-05-04 10:00-11:00 FAMNIT-POSTA Peter Šemrl (Faculty of Mathematics and Physics, University of Ljubljana) Adjacency and coherency preservers We will discuss the problem of describing the general form of adjacency and coherency preservers on 2 by 2 hermitian matrices. This is…
2015-04-28 10:00-11:00 FAMNIT-POSTA Monica Milasi (Università degli Studi di Messina) Variational Problems and Application to a Competitive Equilibrium Problem Competitive equilibrium problems are usually studied by means of fixed point theory. Alternatively, it is possible to study these problems by…
2015-04-20 10:00-11:00 FAMNIT-POSTA Tamas Szonyi (Eotvos University, Budapest) Blocking sets and almost blocking sets A blocking set in a plane is a set of points that meets every line. It is called non-trivial if it does not contain a line.…