Fig. 2.
Inflation of edges and vertices to ribbons and disks. Here we have four vertices, five edges and one boundary component 
. The corresponding surface has Euler characteristic χ=v−e+r=0 and genus g=1, see Equations (2.1) and (2.2).
Inflation of edges and vertices to ribbons and disks. Here we have four vertices, five edges and one boundary component . The corresponding surface has Euler characteristic χ=v−e+r=0 and genus g=1, see Equations (2.1) and (2.2).
