log

age author description
Sun, 02 Nov 2008 13:14:08 -0500 Adam Chlipala Progress and preservation
Sun, 02 Nov 2008 12:20:56 -0500 Adam Chlipala Fix some uglyness
Sun, 02 Nov 2008 12:16:55 -0500 Adam Chlipala Proved concrete substitution