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arXiv · 2304.11585

Semi-derived Ringel-Hall algebras and Hall algebras of odd-periodic relative derived categories

Ji Lin·Liangang Peng
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Abstract

Let $t$ be a positive integer and $\mathcal{A}$ a hereditary abelian category satisfying some finiteness conditions. We define the semi-derived Ringel-Hall algebra of $\mathcal{A}$ from the category $\mathcal{C}_{\mathbb{Z}/t}(\mathcal{A})$ of $\mathbb{Z}/t$-graded complexes and obtain a natural basis of the semi-derived Ringel-Hall algebra. Moreover, we describe the semi-derived Ringel-Hall algebra by the generators and defining relations. In particular, if $t$ is an odd integer, we show that there is an embedding of derived Hall algebra of the odd-periodic relative derived category in the extended semi-derived Ringel-Hall algebra.

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BibTeXRIS

Ji Lin, Liangang Peng. 2023-04-23. Semi-derived Ringel-Hall algebras and Hall algebras of odd-periodic relative derived categories. https://arxiv.org/abs/2304.11585

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