Naturally I zoned out going from QT to T :) I should have not used @S, I should have called it @Triplets, and I also glossed over the output (one match was missing, doh). In main loop should be 

  for my $one (@T) {
    my @matches = induced( \@S, $one );

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In reply to Re^4: Finding subgraphs induced by a set of given vertices. by Anonymous Monk
in thread Finding subgraphs induced by a set of given vertices. by zing

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