Geodesic
Classification and Galois conjugacy of Hamming maps
Ars Mathematica Contemporanea, Tome 4 (2011) no. 2, pp. 313-328.

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We show that for each d ≥ 1 the d-dimensional Hamming graph H(d, q) has an orientably regular surface embedding if and only if q is a prime power pe. If q > 2 there are up to isomorphism φ(q − 1)/e such maps, all constructed as Cayley maps for a d-dimensional vector space over the field Fq. We show that for each such pair (d, q) the corresponding Belyi pairs are conjugate under the action of the absolute Galois group Gal \overline Q, and we determine their minimal field of definition. We also classify the orientably regular embedding of merged Hamming graphs for q > 3.
DOI : 10.26493/1855-3974.130.cba
Keywords: Hamming graph, Hamming map, automorphism group, Galois group. 
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Gareth A. Jones. Classification and Galois conjugacy of Hamming maps. Ars Mathematica Contemporanea, Tome 4 (2011) no. 2, pp. 313-328. doi : 10.26493/1855-3974.130.cba. http://geodesic.mathdoc.fr/articles/10.26493/1855-3974.130.cba/

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