切掉 发表于 2025-3-23 12:38:33
http://reply.papertrans.cn/16/1525/152442/152442_11.pngFlirtatious 发表于 2025-3-23 14:17:48
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Vom Aktenschrank zur Datenbank,Returning for a moment to the problem of solving algebraic equations.Corporeal 发表于 2025-3-24 02:15:02
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ODIR: ,ptical ,isc ,nformation ,etrievalure that is found, for example, in rings, fields, vector spaces, and modules, in which one interprets the inherent addition as a law of composition. All groups of this type are commutative or, as we also will say, abelian, referring to the mathematician N. H. Abel. On the other hand, there are groupABIDE 发表于 2025-3-24 17:56:52
,Kleine Einführung in die Datenbanktheorie,ired that . be a monoid with respect to the multiplication and that the multiplication be distributive over the addition. We will always assume that the multiplication of a ring is ., except for a few occasions in Sect. 2.1. If the nonzero elements of a ring form an (abelian) group under the multipl奇思怪想 发表于 2025-3-24 22:26:07
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