| | Some definitions of interest. |
|
| assert | Def  b == if b True else False fi |
| | | Thm*  b: . b  Prop |
|
| hfun | Def 'a   'b == 'a'b |
| | | Thm* 'a,'b:S. ('a 'b) S |
|
| hhd | Def hd ==  l:'a List. if null(l) then arb('a) else head(l) fi |
| | | Thm* 'a:S. hd (hlist('a) 'a) |
|
| hlist | Def hlist('a) == 'a List |
| | | Thm* 'a:S. hlist('a) S |
|
| mt | Def mt(l) == Case of l; nil True ; a.as' False |
| | | Thm* 'a:Type{i}, l:'a List. mt(l) Prop{1} |
|
| not | Def  A == A   False |
| | | Thm* A:Prop. (A) Prop |
|
| null | Def null(as) == Case of as; nil true ; a.as' false |
| | | Thm* T:Type, as:T List. null(as) |
| | | Thm* null(nil) |
|
| stype | Def S == {T:Type|  x:T. True } |
| | | Thm* S Type{2} |
