Unstable maps

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Gareth A. Jones


A map which is non-orientable or has non-empty boundary has acanonical double cover which is orientable and has empty boundary.The map is called stable if every automorphism of this cover is a liftof an automorphism of the map. This note describes several innitefamilies of unstable maps, and relates them to similar phenomena forgraphs, hypermaps and Klein surfaces.

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How to Cite
Jones, G. (2019). Unstable maps. Acta Mathematica Universitatis Comenianae, 88(2), 341-350. Retrieved from http://www.iam.fmph.uniba.sk/amuc/ojs/index.php/amuc/article/view/1030/657