Thu, 02 May 2013 12:49:15 +0100 Christian Urban eliminated explicit swap_lemmas
Thu, 02 May 2013 11:32:37 +0100 Christian Urban separated recursive functions and UF
Thu, 02 May 2013 08:31:48 +0100 Christian Urban introduced rec_if
(0) -100 -30 -10 -3 +3 +10 +30 tip