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arxiv: 1906.04383 · v1 · pith:DD5YDZIEnew · submitted 2019-06-11 · 🧮 math.RT · math.CO

Indecomposable 0-Hecke modules for extended Schur functions

classification 🧮 math.RT math.CO
keywords functionsschurextendedmodulesbasisheckeindecomposablequasisymmetric
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The extended Schur functions form a basis of quasisymmetric functions that contains the Schur functions. We provide a representation-theoretic interpretation of this basis by constructing $0$-Hecke modules whose quasisymmetric characteristics are the extended Schur functions. We further prove these modules are indecomposable.

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