Chain homotopy projections
نویسندگان
چکیده
منابع مشابه
Projections of Immersed Surfaces and Regular Homotopy
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lor every p-chain c* of the complex X. If ti~t2, then Ti~r2 (that is, ti, t2 induce identical homomorphisms from the homology groups of X into the homology groups of Y). It is well known that the converse is generally false. Several examples to this effect may be found in [2]. A very simple example is given in §2 below. On the other hand, if X is torsion-free, then the relation ti~t2 does imply...
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ژورنال
عنوان ژورنال: Journal of Algebra
سال: 1989
ISSN: 0021-8693
DOI: 10.1016/0021-8693(89)90202-0