机构 发表于 2025-3-25 04:06:34
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Measurable Functions,(X,S) for .. It is customary to call a subset . of .. if and only if it belongs to the σ-ring .. This terminology is not meant to indicate that . is the σ-ring of all µ*-measurable sets with respect to some outer measure µ*, nor even that a non trivial measure is or may be defined on ..Forage饲料 发表于 2025-3-25 15:49:55
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Product Spaces, the sequel uses the words and concepts suggested by this example. Thus, for instance, if . ⊂ . and . ⊂ Y, we shall call the set . = . × . (a subset . × .) a . and we shall refer to the component sets . and . as its . (Observe that our usage here differs from the classical terminology which speaks of rectangles only if the sides are intervals.)ingenue 发表于 2025-3-26 00:58:33
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Measure and Topology in Groups, the assertion that not only is the measure determined by the topology, but that, conversely, all topological concepts may be described in measure theoretic terms. Throughout this section we shall assume thatBrochure 发表于 2025-3-26 09:05:14
Sets and Classes,mbol in a special context, will be denoted by .. The elements of . will be called .; the set . will be referred to as the ., or the . or . space, under consideration. The purpose of this introductory chapter is to define the basic concepts of the theory of sets, and to state the principal results which will be used constantly in what follows.Dna262 发表于 2025-3-26 15:31:03
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