On a Hopf Homotopy Classification Theorem
Keyword(s):
There are various generalizations of Hopf’s brilliant theorem, which may be stated, as newly formulated by Alexandroff; all the homotopy classes of the mappings of a compact Hausdorff space X with dim X≦n into an n-sphere Sn are in a (1-1) -correspondence with the elements of the n-dimensional Čech cohomology group Hn(X) with integer coefficients.
1996 ◽
Vol 48
(1)
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pp. 159-174
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1973 ◽
Vol 15
(3)
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pp. 298-318
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1994 ◽
Vol 05
(02)
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pp. 201-212
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1971 ◽
Vol 23
(3)
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pp. 468-480
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1992 ◽
Vol 44
(4)
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pp. 797-804
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