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This article is cited in 28 scientific papers (total in 28 papers)
The Eilenberg–Borsuk theorem for mappings into an arbitrary complex
A. N. Dranishnikov Steklov Mathematical Institute, Russian Academy of Sciences
Abstract:
The classical Eilenberg–Borsuk theorem on extension of partial mappings into a sphere is generalized to the case of an arbitrary complex $K$. It is formulated in terms of extraordinary dimension theory, which is developed in the present paper. When $K = K(G,\, k)$ is an Eilenberg–MacLane complex, the result can be expressed in terms of cohomological dimension theory. For partial mappings $\varphi\colon A\to K(G,\, k)$ of an $n$-manifold $M$, the following is obtained:
Theorem.
If $k<n-2$, then there exists a compactum $X\subset M$ of dimension $n-k-1$, such that the mapping $\varphi$ extends to $M-X$ and for every abelian group $\pi$ with $\pi\otimes G=0$ the cohomological dimension of $X$ with coefficients in
$\pi$ does not exceed $n-k-2$.
Thus, in comparison with the classical Eilenberg–Borsuk theorem, there is obtained an additional condition as to the cohomological dimension of $X$.
Received: 22.10.1992
Citation:
A. N. Dranishnikov, “The Eilenberg–Borsuk theorem for mappings into an arbitrary complex”, Mat. Sb., 185:4 (1994), 81–90; Russian Acad. Sci. Sb. Math., 81:2 (1995), 467–475
Linking options:
https://www.mathnet.ru/eng/sm891https://doi.org/10.1070/SM1995v081n02ABEH003546 https://www.mathnet.ru/eng/sm/v185/i4/p81
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Abstract page: | 626 | Russian version PDF: | 147 | English version PDF: | 15 | References: | 72 | First page: | 2 |
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