| Some definitions of interest. |
|
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 |
|
le | Def A B == B<A |
| | Thm* i,j: . (i j) Prop |
|
nat_plus | Def  == {i: | 0<i } |
| | Thm*  Type |