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For questions about the derived categories of various abelian categories and questions regarding the derived category construction itself.

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Example of tensor category with non-simple unit $J\to \mathbb{1} \to Q$ and suitably extensi...

Edit: Thanx very much to Neil Strickland for quickly explaining to us that the following cannot be realized over finite commutative $\mathbb{C}$-algebras, as I had originally asked. I know that there …
Simon Lentner's user avatar