Representation theory of the nonstandard Hecke algebra

Details Representation theory of the nonstandard Hecke algebra Representation theory of the nonstandard Hecke algebra

2012-01-10

arxiv.org/abs/1201.2209v2

Mathematics

Representation Theory

26 pages, 3 figures

Scientific paper

The nonstandard Hecke algebra \check{\mathscr{H}}_r was defined by Mulmuley and Sohoni to study the Kronecker problem. We study a quotient \check{\mathscr{H}}_{r,2} of \check{\mathscr{H}}_r, called the nonstandard Temperley-Lieb algebra, which is a subalgebra of the symmetric square of the Temperley-Lieb algebra TL_r. We give a complete description of its irreducible representations. We find that the restriction of an \check{\mathscr{H}}_{r,2}-irreducible to \check{\mathscr{H}}_{r-1,2} is multiplicity-free, and as a consequence, any \check{\mathscr{H}}_{r,2}-irreducible has a seminormal basis that is unique up to a diagonal transformation.

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