Has anyone found a method for counting the number of subgraphs of W3 without actually drawing out every graph and counting them?
--Aoser 16:51, 3 November 2008 (UTC)
Yep, I found. Build the adjacency matrix for W3.
1) Consider (# of ways to choose i vertices), where i=1,2,3,4.
2) Also consider # of places for edges in each configuration (with 1, 2, 3, 4 vertices) - build the edge or not (2 choices).
3) Combine these using product & sum rules of counting.
Hope it helps
--Asuleime 22:45, 5 November 2008 (UTC)
