Submatrices of character tables and basic sets

Details Submatrices of character tables and basic sets Submatrices of character tables and basic sets

2011-10-04

arxiv.org/abs/1110.0818v1

Mathematics

Representation Theory

16 pages

Scientific paper

In this investigation of character tables of finite groups we study basic sets and associated representation theoretic data for complementary sets of conjugacy classes. For the symmetric groups we find unexpected properties of characters on restricted sets of conjugacy classes, like beautiful combinatorial determinant formulae for submatrices of the character table and Cartan matrices with respect to basic sets; we observe that similar phenomena occur for the transition matrices between power sum symmetric functions to bounded partitions and the $k$-Schur functions introduced by Lapointe and Morse. Arithmetic properties of the numbers occurring in this context are studied via generating functions.

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