Tue, 25 Jan 2011 12:14:31 +0000 1. Myhill.thy is proved to correct some typos. 2. Some sections are added to the first direction. 3. The small theory of list difference is now separated into Prefix_subtract.thy and the ROOT.ML
zhang [Tue, 25 Jan 2011 12:14:31 +0000] rev 31
1. Myhill.thy is proved to correct some typos. 2. Some sections are added to the first direction. 3. The small theory of list difference is now separated into Prefix_subtract.thy and the ROOT.ML
(0) -30 -10 -1 +1 +10 +30 +100 +300 tip