On certain enumeration problems in two-dimensional topology

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We announce a solution to several enumeration problems in topology of surfaces. This includes an enumeration of homotopy classes of sections of locally trivial fiber bundles over surfaces and a computation of non-abelian 1-cohomology of surfaces.
16 pages, corrected typos

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Geometric Topology, 57R56, 20C25

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http://salesiana.dossiersoluciones.com/handle/123456789/172637

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0804.1489
 http://arxiv.org/abs/0804.1489

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arXiv