Sat, 26 Nov 2011 17:10:03 +0100 wenzelm sharing of token source with span source;
Sat, 26 Nov 2011 14:14:51 +0100 wenzelm memoing of forked proofs;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -2 +2 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip