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Functions with isolated singularities on surfaces, II
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Let M be a smooth connected compact surface, P be either the real line R^1 or the circle S^1. For a subset X of M denote by D(M,X) the group of diffeomorphisms of M fixed on X. In this note we consider a special class F of smooth maps f:M\to P with isolated singularities which includes all Morse maps. For each such map f from F we consider certain submanifolds X of M that are "adopted" with f in a natural sense, and study the right action of the group D(M,X) on C^{\infty}(M,P). The main result describes the homotopy types of the connected components of the stabilizers S(f) and orbits O(f) for all maps f from F. It extends previous author results on this topic.
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Smooth functions that split a Klein bottle into two M\"obius bands
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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