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Jun 6, 2010 at 22:45 comment added Mohit Singh Thanks for the approach. I thought about it but since the families in question are very close to matroids and exchange axioms are violated on few places, I am not sure checking a few cases will work. But it certainly will work as a quick dirty check.
Jun 5, 2010 at 18:02 history answered Tony Huynh CC BY-SA 2.5