Chronological 发表于 2025-3-26 21:05:18

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hermetic 发表于 2025-3-27 02:57:15

Karin Bruckmüller,Ulrich Schrothn a set-theoretical basis in the next section. Hence for this section a category will not be described by sets (of objects and of arrows) and functions (domain, codomain, composition) but by axioms as in § I.1.

昏睡中 发表于 2025-3-27 08:52:42

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MOT 发表于 2025-3-27 10:28:22

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Amnesty 发表于 2025-3-27 15:38:57

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concise 发表于 2025-3-27 21:36:36

Organic Opals: Properties and Applicationse abelian groups and composition is bilinear), all finite limits and colimits exist, and these limits — especially kernel and cokernel — are well behaved. This leads to a set of axioms describing an “abelian” category. The axioms suffice to prove all the facts about commuting diagrams and connecting

撤退 发表于 2025-3-27 22:22:27

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Glower 发表于 2025-3-28 04:18:07

Hans van Ditmarsch,Barteld Kooiprincipal result for these categories was a “coherence” theorem: If a certain pentagonal diagram (§VII.1.5) in . commutes, then all diagrams involving this . must commute. We now consider various extensions of this result.

Glucocorticoids 发表于 2025-3-28 06:47:03

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vascular 发表于 2025-3-28 13:31:26

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查看完整版本: Titlebook: Categories for the Working Mathematician; Saunders Mac Lane Textbook 1978Latest edition Springer Science+Business Media New York 1978 Adjo