Zu dieser Karteikarte gibt es einen kompletten Satz an Karteikarten. Kostenlos!

Start with a closed mesh with genus 0: 1 vertex surrounded by 1 face:


Three fundamental operation for extending the mesh:

Add new vertex connected by one edge


Connect two existing vertices by a new edge


Genus change: Connect two holes (i.e. faces) by one new edge, thus merging the two holes into one

increases by 1