我不怕牺牲
发表于 2025-3-30 08:51:55
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愉快吗
发表于 2025-3-30 16:07:06
Mappings of Non-zero Degree between 3-manifolds: a New Obstruction,provide a method of analyzing mappings between closed orientable 3-manifolds. In particular, an obstruction to the existence of nonzero degree maps is developed – a part of joint work with S. Boyer and B. Wiest . We also discuss numerous examples to which the obstruction applies..Keywords: 3-mani
Redundant
发表于 2025-3-30 17:36:57
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拾落穗
发表于 2025-3-30 21:06:02
Cohomology Rings of Oriented Seifert Manifolds with mod ps Coefficients,t invariants and c ≤ s. The primary motivation for this work lies in its application to the classification of isomorphism classes of linking forms of closed, connected, oriented 3-manifolds and to abelian WRT-type invariants..Keywords: Seifert manifolds, cup products, cohomology ring, Bockstein map