Topology of the spaces of Morse functions on surfaces

Details Topology of the spaces of Morse functions on surfaces Topology of the spaces of Morse functions on surfaces

2011-04-25

arxiv.org/abs/1104.4792v2

Mathematics

Geometric Topology

15 pages, in Russian

Scientific paper

Let $M$ be a smooth closed orientable surface, and let $F$ be the space of Morse functions on $M$ such that at least $\chi(M)+1$ critical points of each function of $F$ are labeled by different labels (enumerated). Endow the space $F$ with $C^\infty$-topology. We prove the homotopy equivalence $F\sim R\times{\widetilde{\cal M}}$ where $R$ is one of the manifolds ${\mathbb R}P^3$, $S^1\times S^1$ and the point in dependence on the sign of $\chi(M)$, and ${\widetilde{\cal M}}$ is the universal moduli space of framed Morse functions, which is a smooth stratified manifold. Morse inequalities for the Betti numbers of the space $F$ are obtained.

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