Pfaffians and Representations of the Symmetric Group

Details Pfaffians and Representations of the Symmetric Group Pfaffians and Representations of the Symmetric Group

2006-10-17

arxiv.org/abs/math/0610510v1

Mathematics

Combinatorics

28 p

Scientific paper

Pfaffians of matrices with entries z[i,j]/(x\_i+x\_j), or determinants of matrices with entries z[i,j]/(x\_i-x\_j), where the antisymmetrical indeterminates z[i,j] satisfy the Pl\"ucker relations, can be identified with a trace in an irreducible representation of a product of two symmetric groups. Using Young's orthogonal bases, one can write explicit expressions of such Pfaffians and determinants, and recover in particular the evaluation of Pfaffians which appeared in the recent literature.

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