| 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 |
|
gt | Def i>j == j<i |
| | Thm* i,j: . (i>j) Prop |
|
iff | Def P  Q == (P  Q) & (P  Q) |
| | Thm* A,B:Prop. (A  B) Prop |
|
nat | Def == {i: | 0 i } |
| | Thm* Type |
|
nat_plus | Def  == {i: | 0<i } |
| | Thm*  Type |