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arXiv · 1901.05710

Telescopic groups and symmetries of combinatorial maps

Rémi Bottinelli·Laura Grave de Peralta·Alexander Kolpakov
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Abstract

In the present paper, we show that many combinatorial and topological objects, such as maps, hypermaps, three-dimensional pavings, constellations and branched coverings of the two--sphere admit any given finite automorphism group. This enhances the already known results by Frucht, Cori -- Mach\`i, \v{S}ir\'{a}\v{n} -- \v{S}koviera, and other authors. We also provide a more universal technique for showing that ``any finite automorphism group is possible'', that is applicable to wider classes or, in contrast, to more particular sub-classes of said combinatorial and geometric objects. Finally, we show that any given finite automorphism group can be realised by sufficiently many non-isomorphic such entities (super-exponentially many with respect to a certain combinatorial complexity measure).

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Rémi Bottinelli, Laura Grave de Peralta, Alexander Kolpakov. 2019-01-17. Telescopic groups and symmetries of combinatorial maps. https://arxiv.org/abs/1901.05710

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