I have given *multigraph* its own little entry, so that I can point to it (from discussion of Feynman diagrams).

I have given *finite graph* its own minimum entry, just so as to be able to point to it

I needed to explicitly point to *Euler’s formula for planar graphs*. So I gave it a stub entry of its own and added a corresponding remark and pointer below prop. 2.6 at *Euler characteristic*.