Abstract
We construct face two-colourable embeddings of the complete graph \(K_{2n+1}\) in which every face is a cycle of length \(n\); equivalently biembeddings of pairs of symmetric \(n\)-cycle systems. We prove that the necessary and sufficient condition for the existence of such an embedding in an orientable surface is for \(n\ge 3\) to be odd, and in a nonorientable is for \(n\ge 4\).

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The authors wish to thank a referee for a very careful reading of the paper and comments which have made the exposition clearer.
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Griggs, T.S., McCourt, T.A. Biembeddings of Symmetric \(n\)-Cycle Systems. Graphs and Combinatorics 32, 147–160 (2016). https://doi.org/10.1007/s00373-015-1538-1
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DOI: https://doi.org/10.1007/s00373-015-1538-1