Operations on Hypermaps, and Outer Automorphisms

Lynne D. James
1988 European journal of combinatorics (Print)  
We present a group f), isomorphic to PGL(2, Il), of operations on hypermaps, and a group D, isomorphic to GL(2, Il), of operations on oriented hypermaps without boundary. These are induced by the group of automorphisms of a certain group G whose transitive permutation representations correspond to hypermaps.
doi:10.1016/s0195-6698(88)80052-0 fatcat:i5mwonuy6fcvdbhzhlgfsptdiq