Wed, 20 Nov 2013 13:43:09 +0800 chunhan simplifing model, by changing sectxt_of_obj s' (O_proc p) of None \<Rightarrow> False
Tue, 19 Nov 2013 12:31:56 +0800 chunhan update grant_check
(0) -30 -10 -2 +2 +10 tip