Tensor Product and the Stable Green Ring of the Symmetric Group Algebra $F\mathfrak{S}_p$

Fuente: arXiv
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Autori principali: Kua, Manzu, Lim, Kay Jin
Natura: Preprint
Pubblicazione: 2026
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author Kua, Manzu
Lim, Kay Jin
author_facet Kua, Manzu
Lim, Kay Jin
contents We give an explicit formula for the decomposition of the tensor product of any two indecomposable non-projective modules for the symmetric group algebra $F \mathfrak{S}_p$ modulo projective modules. In particular, we show that the tensor product of two simple modules is semisimple modulo projectives. We also compute the Benson--Symonds invariants for all such indecomposable non-projective modules.
format Preprint
id arxiv_https___arxiv_org_abs_2603_11533
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Tensor Product and the Stable Green Ring of the Symmetric Group Algebra $F\mathfrak{S}_p$
Kua, Manzu
Lim, Kay Jin
Representation Theory
Rings and Algebras
20C30, 20C05, 18G65
We give an explicit formula for the decomposition of the tensor product of any two indecomposable non-projective modules for the symmetric group algebra $F \mathfrak{S}_p$ modulo projective modules. In particular, we show that the tensor product of two simple modules is semisimple modulo projectives. We also compute the Benson--Symonds invariants for all such indecomposable non-projective modules.
title Tensor Product and the Stable Green Ring of the Symmetric Group Algebra $F\mathfrak{S}_p$
topic Representation Theory
Rings and Algebras
20C30, 20C05, 18G65
url https://arxiv.org/abs/2603.11533