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Homotopy dimension of orbits of Morse functions on surfaces

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arxiv 0710.4437 v3 pith:SIHIROAQ submitted 2007-10-24 math.AT math.GT

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keywords grouphomotopycomponentsconnectedmorsespaceactionactually
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abstract

Let $f$ be a real- or circle-valued Morse function on a compact surface M having exactly $n>0$ critical points. Denote by $O$ the orbit of $f$ with respect to the right action of the group of diffeomorphisms of $M$. We show that the connected components of $O$ have the homotopy type of a finite-dimensional CW-complex. Actually, these connected components are homotopy equivalent to a certain covering space of the $n$-th configuration space of the interior of $M$. As a consequence we obtain that the fundamental group of $O$ is a subgroup of the $n$-th braid group of $M$.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Smooth functions that split a Klein bottle into two M\"obius bands

    math.GT 2025-08 conditional novelty 6.0 of 10

    The orbit component of a smooth function on a Klein bottle that splits into two Möbius bands is homotopy equivalent to the product of the orbit components of its restrictions to the two bands.

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