# Maria Del Río-Francos: Notes of the dual and petrie operations on maps

Date: 19. 3. 2012

Source: Discrete mathematics seminar

Source: Discrete mathematics seminar

Torek, 20. 3. 2012 od 10h do 12h, Plemljev seminar, Jadranska 19

**Povzetek**. Wilson and Lins showed that for a map

*M*it can be seen that a bijection

*p*and the duality

*d*are operators on

*M*that generate a subgroup of the symmetric group of the set of flags of

*M*, isomorphic to

*S*

_{3}. In this talk I'll explain these operators, based on Wilson's paper: "Operators over regular maps".