2 papers
math.CO2011
Duality index of oriented regular hypermaps
Daniel Pinto
By adapting the notion of chirality group, the duality group of can be defined as the the minimal subgroup such that ${\cal H}/…
math.CO2011
Duality on hypermaps with symmetric or alternating monodromy group
Daniel Pinto
Duality is the operation that interchanges hypervertices and hyperfaces on oriented hypermaps. The duality index measures how far a hypermap is from being self-dual. We say that an…