| 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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band | Def p![](FONT/and.png) q == if p q else false fi |
| | Thm* p,q: . (p![](FONT/and.png) q) ![](FONT/bool.png) |
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iff | Def P ![](FONT/if_big.png) Q == (P ![](FONT/eq.png) Q) & (P ![](FONT/if_big.png) Q) |
| | Thm* A,B:Prop. (A ![](FONT/if_big.png) B) Prop |
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l_all | Def ( x L.P(x)) == x:T. (x L) ![](FONT/eq.png) P(x) |
| | Thm* T:Type, L:T List, P:(T![](FONT/dash.png) Prop). ( x L.P(x)) Prop |
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reduce | Def reduce(f;k;as) == Case of as; nil k ; a.as' f(a,reduce(f;k;as'))
Def (recursive) |
| | Thm* A,B:Type, f:(A![](FONT/dash.png) B![](FONT/dash.png) B), k:B, as:A List. reduce(f;k;as) B |