| Some definitions of interest. |
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assert | Def b == if b True else False fi |
| | Thm* b: . b Prop |
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rep_list | Def rep_list('a;l) == < n: . if n< ||l|| then l[n] else arb('a) fi ,||l||> |
| | Thm* 'a:S, l:'a List. rep_list('a;l) (  'a)  |
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length | Def ||as|| == Case of as; nil 0 ; a.as' ||as'||+1 (recursive) |
| | Thm* A:Type, l:A List. ||l||  |
| | Thm* ||nil||  |
| | Thm* 'a:Type, l:'a List. ||l||  |
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lt_int | Def i< j == if i<j true ; false fi |
| | Thm* i,j: . (i< j)  |
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nat | Def == {i: | 0 i } |
| | Thm* Type |
| | Thm* S |
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stype | Def S == {T:Type| x:T. True } |
| | Thm* S Type{2} |