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On the external link page it seems one has to define which node is the root (though this wouldn't guarantee the tree is the globally optimal), but here it doesn't. I think some clarification on this point is needed. 184.108.40.206 (talk) 15:54, 29 June 2008 (UTC)
This page is pretty much useless. I came here expecting a nice explanation of this algorithm. Alas, it was not to be found! ~ —Preceding unsigned comment added by 220.127.116.11 (talk) 02:37, 11 October 2010 (UTC)