i
i else -i fi
x:
. |x| 
B == 
B < Ai,j:. (ij) PropA == A 
FalseA:Prop. (A) Prop| Some definitions of interest. | |
| absval | Def |i| == if 0i i else -i fi |
| Thm* x:. |x| | |
| le | Def AB == B < A |
| Thm* i,j:. (ij) Prop | |
| not | Def A == A False |
| Thm* A:Prop. (A) Prop |
About:
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