Assertion: graph's vertex | /r/HasProperty | counted as neighbour of u
Facets:
Source sentences:
text: When we count degrees of u {\displaystyle u} and v {\displaystyle v} , we see that their sum is at most n {\displaystyle n} , because a vertex can be counted either as neighbour of u {\displaystyle u} either as neighbour of v {\displaystyle v} :