# 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 know few words about it.

Thank you!

• $|V|{}{}{}{}{}$. – Andrés E. Caicedo Jul 13 '13 at 16:54
• So, it's just the amount of the vertices? – CS1 Jul 13 '13 at 16:55
• That is the standard use. – Andrés E. Caicedo Jul 13 '13 at 16:55
• Thank you so much! you helped me a lot. – CS1 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