[Nauty] directg

Sterten at aol.com Sterten at aol.com
Mon Aug 2 23:18:01 EST 2004

with directg, IMO it would be useful to be able to specify a range  for
indegree and outdegree.
why can't I output any graphs from countg ?
e.g.: geng 7 -bf | countg -g0 | directg -T     won't  work

 how to count all directed forests ?
 how to count all directed acyclic graphs ?
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