# A cardinality of a graph

If I have graph $G=(V,E)\\$

What is the meaning of $|G|$? (The cardinality of G).

I'd like to few words about it...

Thank you!

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$|V|{}{}{}{}{}$. –  Andres Caicedo Jul 13 '13 at 16:54
So, it's just the amount of the vertices? –  Yoar Jul 13 '13 at 16:55
That is the standard use. –  Andres Caicedo Jul 13 '13 at 16:55
Thank you so much! you helped me a lot. –  Yoar Jul 13 '13 at 17:07

Generally, for a given graph $\,G=(V,E),\;$ the standard meaning of $|G|$ is simply $$|G| = |V|$$
While we're on the subject, a few authors write $\|G\|$ to denote the number of edges. –  Austin Mohr Jul 13 '13 at 16:59