| Some definitions of interest. |
|
prime | Def prime(a) == a = 0 & (a ~ 1) & ( b,c: . a | b c  a | b a | c) |
| | Thm* a: . prime(a) Prop |
|
divides | Def b | a == c: . a = b c |
| | Thm* a,b: . (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 |
|
not | Def A == A  False |
| | Thm* A:Prop. ( A) Prop |