5.1: The Basics of Graph Theory - Mathematics LibreTexts
https://math.libretexts.org/Bookshelves/Combinatorics_and_Discrete_Mathematics/Combinatorics_and_Graph_Theory_(Guichard)/05%3A_Graph_Theory/5.01%3A_The_Basics_of_Graph_Theory
WebSee Section 4.5 to review some basic terminology about graphs. A graph G consists of a pair (V, E), where V is the set of vertices and E the set of edges. We write V(G) for the vertices of G and E(G) for the edges of G when necessary to avoid ambiguity, as when more than one graph is under discussion.
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