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Mathematical Research Seminar

2014-01-13 10:00-11:00 FAMNIT-MP Ted Dobson (Mississippi State University, USA) On the Cayley Isomorphism Problem We show that if certain arithmetic conditions hold, then the Cayley isomorphism problem for abelian groups, all of whose Sylow subgroups are elementary abelian or cyclic,…

When Hadamard and usual powers coincide?

2013-12-23 10:00-11:00 FAMNIT-SEMIN Bojan Kuzma When Hadamard and usual powers coincide? We classify real matrices where the standard power coincides with the Hadamrad entry-wise. The problem appeared recently in vol 51 of IMAGE journal.  Time permitting we will present some further problems from…

Second Neighbourhood Conjecture

2013-11-11 10:00-11:00 FAMNIT-SEMIN Anja Komatar Second Neighbourhood Conjecture Second Neighbourhood Conjecture states that every oriented graph has a vertex with second neighbourhood at least as large as first. We show that if a counterexample exists, it has a large minimal…

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