AKPW
Also see the page on Low Stretch Spanning Trees
Laplacians.akpw — Methodtree = akpw(graph; ver=0)Computes a low stretch spanning tree of graph, and returns it as a graph. The default version is 0. In event of emergency, one can try ver=2. It is usually slower, but might have slightly better stretch.
Laplacians.akpwU — Methodtree = akpwU(graph)Computes a low stretch spanning tree of an unweighted graph, and returns it as a graph.