|
This article is cited in 3 scientific papers (total in 3 papers)
Small covers of graph-associahedra and realization of cycles
A. A. Gaifullin Steklov Mathematical Institute of Russian Academy of Sciences, Moscow
Abstract:
An oriented connected closed manifold $M^n$ is called a $\mathrm{URC}$-manifold if for any oriented connected closed manifold $N^n$ of the same dimension there exists a nonzero-degree mapping of a finite-fold covering $\widehat{M}^n$ of $M^n$ onto $N^n$. This condition is equivalent to the following: for any $n$-dimensional integral homology class of any topological space $X$, a multiple of it can be realized as the image of the fundamental class of a finite-fold covering $\widehat{M}^n$ of $M^n$ under a continuous mapping $f\colon \widehat{M}^n\to X$. In 2007 the author gave a constructive proof of Thom's classical result that a multiple of any integral homology class can be realized as an image of the fundamental class of an oriented smooth manifold. This construction yields the existence of $\mathrm{URC}$-manifolds of all dimensions. For an important class of manifolds, the so-called small covers of graph-associahedra corresponding to connected graphs, we prove that either they or their two-fold orientation coverings are $\mathrm{URC}$-manifolds. In particular, we obtain that the two-fold covering of the small cover of the usual Stasheff associahedron is a $\mathrm{URC}$-manifold. In dimensions 4 and higher, this manifold is simpler than all the previously known $\mathrm{URC}$-manifolds.
Bibliography: 39 titles.
Keywords:
realization of cycles, domination relation, $\mathrm{URC}$-manifold, small cover, graph-associahedron.
Received: 11.04.2016 and 24.08.2016
Citation:
A. A. Gaifullin, “Small covers of graph-associahedra and realization of cycles”, Mat. Sb., 207:11 (2016), 53–81; Sb. Math., 207:11 (2016), 1537–1561
Linking options:
https://www.mathnet.ru/eng/sm8714https://doi.org/10.1070/SM8714 https://www.mathnet.ru/eng/sm/v207/i11/p53
|
Statistics & downloads: |
Abstract page: | 685 | Russian version PDF: | 109 | English version PDF: | 18 | References: | 65 | First page: | 47 |
|