CROSS
发表于 2025-3-21 16:44:50
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DEMUR
发表于 2025-3-21 23:08:40
A. Moreno,J. M. P. Carmelo,A. MuramatsuThe definition of a topological space given in Chapter 1 fits quite well our intuitive idea of what a space ought to be. Unfortunately, it is not terribly convenient to work with, and our first job is to produce an equivalent, more manageable, set of axioms.
Spartan
发表于 2025-3-22 03:55:11
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讨厌
发表于 2025-3-22 06:19:11
https://doi.org/10.1007/978-3-642-59354-3The whole of this chapter will be devoted to applications of homology theory. We start by defining the ‘degree’ of a map from the .-sphere to itself, a concept due to Brouwer which allows one to decide whether or not two such maps are homotopic.
Inflammation
发表于 2025-3-22 09:05:00
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Incisor
发表于 2025-3-22 16:04:41
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SUE
发表于 2025-3-22 19:58:54
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Chipmunk
发表于 2025-3-22 21:18:51
The Fundamental Group,We gave a brief description of how to set about defining the fundamental group of a space at the end of Chapter 1. We recall that the idea is to manufacture a group out of the set of loops in the space which begin and end at some specified point (usually referred to as the base point).
FLINT
发表于 2025-3-23 03:52:38
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抛物线
发表于 2025-3-23 09:25:53
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