All maps of type (m,n) are covered by a universal map M(m,n) which lies on one of the three simply connected Riemann surfaces; in fact M(m,n) covers all maps of type (r,s) where r|m and s|n. In this paper we construct a tessellation M which is universal for all maps on all surfaces. We also consider the tessellation M(8,3) which covers all triangular maps. This coincides with the well-known Farey tessellation and we find many connections between M(8,3) and M.
@article{urn:eudml:doc:43171, title = {Universal tessellations.}, journal = {Revista Matem\'atica de la Universidad Complutense de Madrid}, volume = {1}, year = {1988}, pages = {111-123}, zbl = {0658.57004}, mrnumber = {MR0977044}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:43171} }
Singerman, David. Universal tessellations.. Revista Matemática de la Universidad Complutense de Madrid, Tome 1 (1988) pp. 111-123. http://gdmltest.u-ga.fr/item/urn:eudml:doc:43171/