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arXiv · 2105.14911

On the extension-closed property for the subcategory $\text{Tr}(Ω^2({\rm mod}-A))$

Bernhard Böhmler·René Marczinzik
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Abstract

We present a monomial quiver algebra $A$ having the property that the subcategory $\text{Tr}(Ω^2({\rm mod}-A))$ is not extension-closed. This answers a question raised by Idun Reiten.

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Bernhard Böhmler, René Marczinzik. 2021-06-07. On the extension-closed property for the subcategory $\text{Tr}(Ω^2({\rm mod}-A))$. https://arxiv.org/abs/2105.14911

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