Sun, 10 Oct 2010 23:16:24 +0200 krauss do not mention unqualified names, now that 'global' and 'local' are gone
Sun, 10 Oct 2010 16:34:20 +0200 nipkow simplified proof
Sun, 10 Oct 2010 18:42:13 +0700 blanchet avoid generating several formulas with the same name ("tfrees")
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip