Sincere wide $ \tau $-tilting modules

Enomoto and Sakai introduced wide $ \tau $-tilting modules, which are $ \tau $-tilting modules over functorially finite wide subcategories. They also proved that wide $ \tau $-tilting modules bijection with doubly functorially finite image-cokernel-extension-closed (ICE-closed) subcategories, which extended Adachi-Iyama-Reiten's result. In this paper, we show that this bijection can be restricted to the support sets. As a consequence, we establish bijections between sincere wide $ \tau $-tilting modules, sincere ICE-closed subcategories, and sincere epibricks, and then we show that its number is related to the little Schr$ \ddot{o} $der number for Nakayama algebras.

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Publication Details

Journal
Electronic Research Archive
Published
2025-01-01
DOI
https://doi.org/10.3934/era.2025099
Primary Topic
Algebraic structures and combinatorial models
Type
article
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article

Sincere wide $ \tau $-tilting modules

Hanpeng Gao, Zhou Yun-long, Yuanfeng Zhang
Electronic Research Archive
Algebraic structures and combinatorial models
article

Sincere wide $ \tau $-tilting modules

Hanpeng Gao, Zhou Yun-long, Yuanfeng Zhang
article en

Abstract

Enomoto and Sakai introduced wide $ \tau $-tilting modules, which are $ \tau $-tilting modules over functorially finite wide subcategories. They also proved that wide $ \tau $-tilting modules bijection with doubly functorially finite image-cokernel-extension-closed (ICE-closed) subcategories, which extended Adachi-Iyama-Reiten's result. In this paper, we show that this bijection can be restricted to the support sets. As a consequence, we establish bijections between sincere wide $ \tau $-tilting modules, sincere ICE-closed subcategories, and sincere epibricks, and then we show that its number is related to the little Schr$ \ddot{o} $der number for Nakayama algebras.

Electronic Research ArchiveVol. 33(4)
Anhui University (CN)
Openalex Percentile: Top 87%
Algebraic structures and combinatorial models
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