The Algebra of Conjugacy Classes in Symmetric Groups and Partial Permutations

Details The Algebra of Conjugacy Classes in Symmetric Groups and Partial Permutations The Algebra of Conjugacy Classes in Symmetric Groups and Partial Permutations

2003-02-18

arxiv.org/abs/math/0302203v1

Journal of Mathematical Sciences (Kluwer) 107 (2001) no.5 4212-4230

Mathematics

Combinatorics

AMS-TeX, 19 pages, no figures

Scientific paper

We prove a convolution formula for the conjugacy classes in symmetric groups conjectured by the second author. A combinatorial interpretation of coefficients is provided. As a main tool we introduce new semigroup of partial permutations. We describe its structure, representations, and characters. We also discuss filtrations on the subalgebra of invariants in the semigroup algebra.

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