| | Some definitions of interest. |
|
| assert | Def b == if b True else False fi |
| | | Thm* b: . b Prop |
|
| eq_int | Def i= j == if i=j true ; false fi |
| | | Thm* i,j: . (i= j)  |
|
| iff | Def P  Q == (P  Q) & (P  Q) |
| | | Thm* A,B:Prop. (A  B) Prop |
|
| int_seg | Def {i..j } == {k: | i k < j } |
| | | Thm* m,n: . {m..n } Type |
|
| nat | Def == {i: | 0 i } |
| | | Thm* Type |