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(Co)chain complexes, abelian Categories, (pre)sheaves, (co)homology in various (possibly highly generalized) settings, spectra, derived functors, resolutions, spectral sequences, homotopy categories. Chain complexes in an abelian category form the heart of homological algebra.

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A question on curved algebras, papers by Positselski and E. Segal

The answer is that you shouldn't believe everything you read on the arxiv... The result I claim in that paper is wrong, at least in that level of generality. The problem is that I try to use the compl …
Ed Segal's user avatar
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