5 search results - page 1 / 1 » Liftings of automorphisms of hypermaps |
DM
2000
13 years 4 months ago
2000
DM
2010
13 years 5 months ago
2010
Abstract: Duality and chirality are examples of operations of order 2 on hypermaps. James showed that the groups of all operations on hypermaps and on oriented hypermaps can be ide...
COMBINATORICS
2007
13 years 4 months ago
2007
A hypermap is (hypervertex-) bipartite if its hypervertices can be 2-coloured in such a way that “neighbouring” hypervertices have different colours. It is bipartiteuniform i...
EJC
2006
13 years 5 months ago
2006
A general method for finding elementary abelian regular covering projections of finite connected graphs is applied to the Petersen graph. As a result, a complete list of pairwise ...
JCT
2006
13 years 4 months ago
2006
Let Ng(f ) denote the number of rooted maps of genus g having f edges. An exact formula for Ng(f ) is known for g = 0 (Tutte, 1963), g = 1 (Arques, 1987), g = 2,3 (Bender and Canf...