i
i else -i fi
x:
. |x| 
q == if p q else false fip,q:
. (pq) i,j:. (i > j) Prop
== {i:| i 
0 } Typej == if i < j true ; false fii,j:. (i < j) 
A == A 
FalseA:Prop. (A) Prop| Some definitions of interest. | |
| absval | Def |i| == if 0i i else -i fi |
| Thm* x:. |x| | |
| band | Def pq == if p q else false fi |
| Thm* p,q:. (pq) | |
| gt | Def i > j == j < i |
| Thm* i,j:. (i > j) Prop | |
| int_nzero | Def == {i:| i 0 } |
| Thm* Type | |
| lt_int | Def i < j == if i < j true ; false fi |
| Thm* i,j:. (i < j) | |
| not | Def A == A False |
| Thm* A:Prop. (A) Prop |
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