# QSym over Sym has a stable basis

Abstract : We prove that the subset of quasisymmetric polynomials conjectured by Bergeron and Reutenauer to be a basis for the coinvariant space of quasisymmetric polynomials is indeed a basis. This provides the first constructive proof of the Garsia―Wallach result stating that quasisymmetric polynomials form a free module over symmetric polynomials and that the dimension of this module is $n!$.
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https://hal.inria.fr/hal-01186295
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• HAL Id : hal-01186295, version 1

### Citation

Aaron Lauve, Sarah K Mason. QSym over Sym has a stable basis. 22nd International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2010), 2010, San Francisco, United States. pp.367-378. ⟨hal-01186295⟩

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