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Proportionally Dense Subgraphs of Maximum Size.

2019-12-09 10:00 — 11:00 FAMNIT-MP1 Clément Dallard (UP FAMNIT) Proportionally Dense Subgraphs of Maximum Size. The notion of density of a subgraph is usually defined as the number of edges in the subgraph divided by the number of its vertices.…

Graded dihedral axial algebras

2019-12-02 10:00 — 11:00 FAMNIT-MP1 Madeleine Whybrow (UP FAMNIT) Graded dihedral axial algebras Axial algebras are non-associative algebras generated by semisimple idempotents, known as axes, whose eigenvectors obey a given fusion law. These algebras have been shown to occur in…

Mathematical Advent Calendar 2019

Elementary School students (8th and 9th year) and High School students are invited to compete in solving problems as part of the  Mathematical Advent Calendar. The competitors are divided into three categories: 1st level (Elementary School, 2nd level (High School,…

Generalised voltage graphs.

2019-11-25 10:00 — 11:00 FAMNIT-MP1 Micael Toledo (IMFM – UP FAMNIT, Slovenia) Generalised voltage graphs. Given a graph X and a group G we may construct a covering graph Cov(X,Z) by means of a function (called a voltage assignment) Z,…

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