-inductive CC_Re (i,j,k:nat): Prop ≝
- | star_star: i = 0 → j = 0 → k = 0 → CC_Re i j k
- | box_star : i = 1 → j = 0 → k = 0 → CC_Re i j k
- | box_box : i = 1 → j = 1 → k = 1 → CC_Re i j k
- | star_box : i = 0 → j = 1 → k = 1 → CC_Re i j k
+inductive CC_Re: nat → nat → nat → Prop ≝
+ | star_star: CC_Re 0 0 0
+ | box_star : CC_Re 1 0 0
+ | box_box : CC_Re 1 1 1
+ | star_box : CC_Re 0 1 1