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arXiv · 1603.00775

The Ziegler spectrum for derived-discrete algebras

Kristin Krogh Arnesen·Rosanna Laking·David Pauksztello·Mike Prest
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Abstract

Let $\Lambda$ be a derived-discrete algebra. We show that the Krull-Gabriel dimension of the homotopy category of projective $\Lambda$-modules, and therefore the Cantor-Bendixson rank of its Ziegler spectrum, is $2$, thus extending a result of Bobi\'nski and Krause. We also describe all the indecomposable pure-injective complexes and hence the Ziegler spectrum for derived-discrete algebras, extending a result of Z. Han. Using this, we are able to prove that all indecomposable complexes in the homotopy category of projective $\Lambda$-modules are pure-injective, so obtaining a class of algebras for which every indecomposable complex is pure-injective but which are not derived pure-semisimple.

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BibTeXRIS

Kristin Krogh Arnesen, Rosanna Laking, David Pauksztello, Mike Prest. 2016-03-02. The Ziegler spectrum for derived-discrete algebras. https://arxiv.org/abs/1603.00775

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