复杂
发表于 2025-3-21 18:34:09
书目名称Measure and Category影响因子(影响力)<br> http://figure.impactfactor.cn/if/?ISSN=BK0628052<br><br> <br><br>书目名称Measure and Category影响因子(影响力)学科排名<br> http://figure.impactfactor.cn/ifr/?ISSN=BK0628052<br><br> <br><br>书目名称Measure and Category网络公开度<br> http://figure.impactfactor.cn/at/?ISSN=BK0628052<br><br> <br><br>书目名称Measure and Category网络公开度学科排名<br> http://figure.impactfactor.cn/atr/?ISSN=BK0628052<br><br> <br><br>书目名称Measure and Category被引频次<br> http://figure.impactfactor.cn/tc/?ISSN=BK0628052<br><br> <br><br>书目名称Measure and Category被引频次学科排名<br> http://figure.impactfactor.cn/tcr/?ISSN=BK0628052<br><br> <br><br>书目名称Measure and Category年度引用<br> http://figure.impactfactor.cn/ii/?ISSN=BK0628052<br><br> <br><br>书目名称Measure and Category年度引用学科排名<br> http://figure.impactfactor.cn/iir/?ISSN=BK0628052<br><br> <br><br>书目名称Measure and Category读者反馈<br> http://figure.impactfactor.cn/5y/?ISSN=BK0628052<br><br> <br><br>书目名称Measure and Category读者反馈学科排名<br> http://figure.impactfactor.cn/5yr/?ISSN=BK0628052<br><br> <br><br>
entrance
发表于 2025-3-21 22:50:37
Liouville Numbers,erty in question, in fact, most points of the interval (in the sense of cardinal number, or measure, or category, respectively) have the property. As a first illustration of this method let us consider the existence of transcendental numbers.
无底
发表于 2025-3-22 02:39:08
Lebesgue Measure in ,-Space,of the notion of volume to a larger class of sets. Thus Lebesgue measure has a different meaning in spaces of different dimension. However, since we shall usually regard the dimension as fixed, there is no need to indicate r explicitly in our notations.
慢跑鞋
发表于 2025-3-22 05:21:41
The Property of Baire,e addition and multiplication, respectively. Such a class is also closed under the operations of union and difference. It is therefore a ring of subsets of its union, as this term was defined in Chapter 3.
梯田
发表于 2025-3-22 11:50:41
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Robust
发表于 2025-3-22 16:55:36
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不合
发表于 2025-3-22 20:27:00
The Banach Category Theorem, union of any family of open sets of measure zero has measure zero (for any measure defined for all open sets). It is remarkable that the first statement remains valid whether the space has a countable base or not. The second statement, however, needs to be qualified.
庄严
发表于 2025-3-23 00:20:21
,The Poincaré Recurrence Theorem,oint of view, this “recurrence theorem” has a special interest, because in proving it Poincaré anticipated the notions of both measure and category. Publication of his treatise, “Les méthodes nouvelles de la mécanique céleste” , antedated slightly the introduction of either notion.
用树皮
发表于 2025-3-23 04:19:24
Non-Measurable Sets,e consistent among themselves. No actual example of anon-measurable set that admits such a representation is known (but see ). Nevertheless, with the aid of the axiom of choice it is easy to show that non-measurable sets exist. We shall consider several such constructions.
inundate
发表于 2025-3-23 08:29:27
,The Sierpinski-Erdös Duality Theorem,to look for a category analogue, or a measure analogue, has very often proved to be a useful guide. In this and the following chapters we shall take a closer look at the duality we have observed between measure and category, to see how far it extends in the case of the line and other spaces, and to discover what underlies it.