Chronological 发表于 2025-3-26 21:05:18
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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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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
http://reply.papertrans.cn/23/2226/222541/222541_37.pngGlower 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
http://reply.papertrans.cn/23/2226/222541/222541_39.pngvascular 发表于 2025-3-28 13:31:26
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