Homotopy invariants of Gauss phrases

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Equivalence relations can be defined on Gauss phrases using combinatorial moves. In this paper we consider two closely related equivalence relations on Gauss phrases, homotopy and open homotopy. In particular, in each case, we define a new invariant and determine the values that it can attain.
17 pages. Second version: Contents reordered, some definitions and proofs improved

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Geometric Topology, Combinatorics, 57M99 (primary); 68R15 (secondary)

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http://salesiana.dossiersoluciones.com/handle/123456789/217876

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0810.4389
 http://arxiv.org/abs/0810.4389

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arXiv