13 May
2009
13 May
'09
8:38 p.m.
The latter implies that undirected graphs have to have two copies of each edge, one pointed each direction.
Which is correct? The former, I hope :-) Thanks.
Undirected graphs store only one set of edges. The implementation of the just makes it seem like two different copies :) Andrew Sutton andrew.n.sutton@gmail.com