Cohomology of exact categories and (non-)additive sheaves
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🧮 math.KT
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additivecategoriescohomologyexactnon-sheavesabsoluteapproach
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We use (non-)additive sheaves to introduce an (absolute) notion of Hochschild cohomology for exact categories as Ext's in a suitable bisheaf category. We compare our approach to various definitions present in the literature.
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