Hi,
I need to construct a BFS order (rooted in v0 for example) from a graph,
Then, I need to obtain the vertex at distance min{r, d(v,v0)} from v on the
path of the BFS-tree from v to v0.
I'd like to know if I have to build myself the tree from the list obtained
by the function breadth_first_search of Sage or if there is an easiest way
to get this vertex.
Thanks,
François
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