| 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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filter | Def filter(P;l) == reduce(a,v. if P(a) [a / v] else v fi;nil;l) |
| | Thm* T:Type, P:(T), l:T List. filter(P;l) T List |
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l_all | Def (xL.P(x)) == x:T. (x L) P(x) |
| | Thm* T:Type, L:T List, P:(TProp). (xL.P(x)) Prop |
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not | Def A == A False |
| | Thm* A:Prop. (A) Prop |