Ambient homogeneity (in Russian)

A. Skopenkov
Arxiv ID: 1003.5278Last updated: 12/20/2021
This note is purely expository. A subset N of the plane is affine ambient homogeneous if for each x,y in N there exists an affine transformation taking x to y and N to itself. The result of D. Repovs, E. V. Scepin and the author on such subsets is presented, together with discussion, corollaries and generalizations. At the end some non-elementary corollaries are given (including a simple proof of the smooth version of the Hilbert-Smith conjecture on topological groups). Most part of the text is accessible to undergraduates familiar with the notion of continuity. The text could be an interesting easy reading for mature mathematicians.

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