wikipedia search on "field of moduli" gives basically just this hit:


Dessin d'enfant
The two Belyi functions ƒ 1 and ƒ 2 of this example are defined over the field of moduli, but there exist dessins for which the field of ...
23 KB (3,621 words) - 02:40, 15 September 2010


?? which is definitely interesting .... although i admit that i'm not sure to what extent i actually remember what prompted me to search on this ...