glamor
发表于 2025-3-27 00:27:45
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harmony
发表于 2025-3-27 04:37:42
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Noisome
发表于 2025-3-27 09:09:50
0072-5285 bra and topology) with a minimum of prerequisites. No homological algebra is assumed beyond what is normally learned in a first course in algebraic topology. The basics of the subject are given (along with exercises) before the author discusses more specialized topics.978-1-4684-9327-6Series ISSN 0072-5285 Series E-ISSN 2197-5612
Eviction
发表于 2025-3-27 10:58:32
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placebo
发表于 2025-3-27 14:54:20
https://doi.org/10.1007/978-1-4899-1406-4ed algebraic topology. The reader is advised to skip this section (or skim it lightly) and refer back to it as necessary. We will omit some of the proofs; these are either easy or else can be found in standard texts, such as Dold , Spanier , or MacLane .
宣传
发表于 2025-3-27 18:07:23
https://doi.org/10.1007/978-3-663-05589-1.′. Note that if . is projective over . and .′ is projective over .′ then . ⊗ .′ is projective over .[. × .′]. In fact, it suffices to verify this in the case where . = . and .′ = .′, in which case the assertion follows from the obvious isomorphism . ⊗ .′ ≈ .[. × .′].
Hot-Flash
发表于 2025-3-27 23:54:11
https://doi.org/10.1057/9780230617001properties and that cohomology has “dual” properties. If . is finite, however, then homology and cohomology seem to have . properties rather than dual ones. For example, since every subgroup . of a finite group . has finite index, we have restriction and corestriction maps for . subgroups, in both h
沐浴
发表于 2025-3-28 05:37:08
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不整齐
发表于 2025-3-28 08:28:02
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认为
发表于 2025-3-28 12:00:52
Separatism and Sovereignty in the New Europe. In the general case, one might hope to “explain” the high-dimensional cohomology of Γ in terms of the torsion in Γ. (This is analogous to the situation of Chapter IX, where we tried to explain the non-integrality of χ(Γ) in terms of the torsion in Γ.)