2 research outputs found
Counting hypermaps by Egorychev's method
V ÄŤlánku urÄŤĂme explicitnĂ© vzorce na poÄŤet hypermap danĂ©ho rodu s danĂ˝m poÄŤtom šĂpov.The aim of this paper is to find explicit formulae for the number of rooted hypermaps with a given number of darts on an orientable surfaces of genus at most three