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Define preadditive categories #2176

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TwoFX opened this issue Mar 18, 2020 · 1 comment
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Define preadditive categories #2176

TwoFX opened this issue Mar 18, 2020 · 1 comment
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@semorrison
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feature-request This issue is a feature request, either for mathematics, tactics, or CI
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Homological algebra

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@TwoFX
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TwoFX commented Mar 18, 2020

Preadditive categories are a prerequisite for abelian categories. Since preadditive categories are categories enriched over the category of abelian groups, this will follow from @semorrison's enriched categories.
@TwoFX TwoFX added this to In progress in Homological algebra Mar 18, 2020
@bryangingechen bryangingechen added the feature-request This issue is a feature request, either for mathematics, tactics, or CI label Mar 30, 2020
@jcommelin
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Done: https://leanprover-community.github.io/mathlib_docs/find/category_theory.preadditive

@jcommelin jcommelin moved this from In progress to Done in Homological algebra Oct 1, 2021
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