| | Some definitions of interest. |
|
| hall | Def all ==  p:'a   .   x:'a. (p(x)) |
| | | Thm* 'a:S. all  (('a hbool) hbool) |
|
| assert | Def  b == if b True else False fi |
| | | Thm* b:. b Prop |
|
| hequal | Def equal == x:'a. y:'a. x = y |
| | | Thm* 'a:S. equal ('a 'a hbool) |
|
| bequal | Def x = y ==  (x = y T) |
| | | Thm* T:Type, x,y:T. (x = y) |
|
| hnum | Def hnum ==  |
| | | Thm* hnum S |
|
| hpre | Def pre == n:. pre(n) |
| | | Thm* pre (hnum hnum) |
|
| hsub | Def sub == m:. n:. nnsub(m;n) |
| | | Thm* sub (hnum hnum hnum) |
|
| nat | Def == {i: | 0 i } |
| | | Thm* Type |
| | | Thm* S |
|
| nnsub | Def nnsub(m;n) == if m< n then 0 else m-n fi |
| | | Thm* m,n:. nnsub(m;n) |
|
| pre | Def pre(n) == if n=0 then 0 else n-1 fi |
| | | Thm* n:. pre(n) |
|
| tlambda | Def (x:T. b(x))(x) == b(x) |
