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arxiv: 1008.2401 · v1 · pith:ME2RVC3Cnew · submitted 2010-08-13 · 🧮 math.RT · math.QA

A Combinatorial Formula for Orthogonal Idempotents in the 0-Hecke Algebra of the Symmetric Group

classification 🧮 math.RT math.QA
keywords algebracombinatorialgroupheckeidempotentsorthogonalsymmetricbranching
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Building on the work of P.N. Norton, we give combinatorial formulae for two maximal decompositions of the identity into orthogonal idempotents in the $0$-Hecke algebra of the symmetric group, $\mathbb{C}H_0(S_N)$. This construction is compatible with the branching from $S_{N-1}$ to $S_{N}$.

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