Callow
发表于 2025-3-21 17:31:10
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Chemotherapy
发表于 2025-3-21 20:36:41
Surfaces,c to each of them along their boundaries yields a closed surface. Conversely, any compact surface with boundary is obtained from a closed surface by the removal of several open discs—wherever these discs are located or whatever their shape, only their number is of importance. At the present stage we
证明无罪
发表于 2025-3-22 03:33:37
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钩针织物
发表于 2025-3-22 08:29:52
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惹人反感
发表于 2025-3-22 08:50:46
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压舱物
发表于 2025-3-22 14:29:06
Algorithmic Recognition of the Sphere,sums of tori and connected sums of projective planes. The classification problem for three-dimensional manifolds has not yet been solved up to now. This is one of the most important and complicated problems in the topology of manifolds. There is, however, rather substantial progress in this field. S
Ballad
发表于 2025-3-22 19:34:15
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HEW
发表于 2025-3-23 00:08:25
Surgery along Links,ere by regluing a regular neighbourhood of a certain link, i.e. by removing such a neighbourhood and gluing it back again through a homeomorphism of two-dimensional tori on the boundaries. To precisize the formulation of this result, we consider for simplicity the case of one-component links, i.e. k
sclera
发表于 2025-3-23 02:33:18
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ingestion
发表于 2025-3-23 08:31:04
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