The University of Michigan Combinatorics Seminar


Abstract 

I will discuss the rich combinatorics of dimension vectors of quivers. As an application, I will describe LittlewoodRichardson coefficients which are equal to 1. The triples of partitions for which the LRcoefficient is equal to 1 can be constructed in a similar recursive way as in Horn's conjecture for eigenvalues of sums of Hermitian matrices. (Joint work with Jerzy Weyman.) 