====== Lucas Rusnak (Binghamton) ======

====== A Multidirected Hypergraph Representation of Matrices with 0, 1, −1 Entries, Parts I and II ======

===== Abstract for the Combinatorics Seminar 2008 December 9, 16 =====

A multi-directed hypergraph is a combinatorial representation of {0, +1, −1}-matrices that extends the concepts of signed graphs to hypergraphic analogs. I will discuss their discovery and development from hypergraphic matrices and the problems in extending the signed-graphic treatment of the classification of column dependencies.


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