| 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 |
|
int_upper | Def {i...} == {j: | i j } |
| | Thm* n: . {n...} Type |
|
nat | Def == {i: | 0 i } |
| | Thm* Type |
|
not | Def A == A  False |
| | Thm* A:Prop. ( A) Prop |