Functions on surfaces and incompressible subsurfaces

Details Functions on surfaces and incompressible subsurfaces Functions on surfaces and incompressible subsurfaces

2010-01-08

arxiv.org/abs/1001.1346v2

Mathematics

Geometric Topology

This is an improved version of the second part of my paper arXiv:0806.4704 which is currently removed from arXiv:0806.4704. 23

Scientific paper

Let $M$ be a smooth connected compact surface, $P$ be either a real line or a circle. This paper proceeds the study of the stabilizers and orbits of smooth functions on $M$ with respect to the right action of the group of diffeomorphisms of $M$. A large class of smooth maps $f:M-->P$ with isolated singularities is considered and it is shown that the general problem of calculation of the fundamental group of the orbit of $f$ reduces to the case when the Euler characteristic of $M$ is non-negative. For the proof of main result incompressible subsurfaces and cellular automorphisms of surfaces are studied.

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