Enumerating regular maps and hypermaps.
Noncongruence subgroups of the Hecke groups G (...).
Maps on surfaces and Galois groups
The Farey graph.
Automorphic subsets of the -dimensional cube.
Infinitely many hypermaps of a given type and genus.
Platonic hypermaps.
Rotary hypermaps of genus 2.
Double coverings and reflexive abelian hypermaps.
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