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Cellularity of generalized Schur algebras via Cauchy decomposition (2002.02932v1)
Published 7 Feb 2020 in math.RT
Abstract: We describe a generalization of Hashimoto and Kurano's Cauchy filtration for divided powers algebras. This filtration is then used to provide a cellular structure for generalized Schur algebras associated to an arbitrary cellular algebra. Applications to the cellularity of wreath product algebras $A \wr \mathfrak{S}_d$ are also considered.
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