生来 发表于 2025-3-26 20:57:07
0172-5939 nsion; and the fourth rests on the work of Markov, Kakutani, and Ryll–Nardzewski surrounding fixed points for families of affine maps..978-3-319-80251-0978-3-319-27978-7Series ISSN 0172-5939 Series E-ISSN 2191-6675鸽子 发表于 2025-3-27 04:01:12
http://reply.papertrans.cn/15/1408/140794/140794_32.pngArthr- 发表于 2025-3-27 08:25:14
Universitexthttp://image.papertrans.cn/a/image/140794.jpgheterogeneous 发表于 2025-3-27 09:46:07
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http://reply.papertrans.cn/15/1408/140794/140794_35.pngRecess 发表于 2025-3-27 18:46:52
Der Colombo-Effekt: komplexe Lösungen bietenalue problems, and to the problem of ranking internet web pages. After this we’ll show how the notion of fixed point arises in set theory, where it provides an easy proof of the Schröder–Bernstein theorem. We’ll introduce the famous Brouwer Fixed-Point Theorem, show how it applies to the study of ma战胜 发表于 2025-3-27 23:47:55
Alexander Verweyen,Gregor Eckertter we’ll give a proof of this special case of Brouwer’s result, but for triangles rather than discs; closed triangles are homeomorphic to closed discs (Exercise 2.2 below) so our result will be equivalent to Brouwer’s. We’ll base our proof on an apparently unrelated combinatorial lemma due to EmanuAdjourn 发表于 2025-3-28 03:34:11
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https://doi.org/10.1007/978-3-540-71739-3formation,” and “invariant subspace” means “closed (linear) subspace that the operator takes into itself.” To say that a subspace is “nontrivial” means that it is neither the zero subspace nor the whole space. Examples constructed toward the end of the last century show that in the generality of BanEviction 发表于 2025-3-28 14:30:08
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