Mathematical Sciences Classification System
18Exx - Abelian categories
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                            18E05Preadditive, additive categories
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                            18E10Exact categories, abelian categories
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                            18E15Grothendieck categories
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                            18E20Embedding theorems [See also 18B15]
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                            18E25Derived functors and satellites
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                            18E30Derived categories, triangulated categories
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                            18E35Localization of categories
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                            18E40
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                            18E99None of the above, but in this section