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Enumerative combinatorics, graph theory, order theory, posets, matroids, designs and other discrete structures. It also includes algebraic, analytic and probabilistic combinatorics.

3 votes
1 answer
476 views

Kostka Matrix Identity

How does one prove $K^{-1}K = I$ using a more general sign reversing involution, where $K$ is the Kostka matrix and $I$ is the identity matrix?