P
A:Prop. Dec(A) 
PropA:Type, B:(A
Type), p:(a:A
B(a)). 1of(p) AA:Type, B:(AType), p:(a:AB(a)). 2of(p) B(1of(p))| Some definitions of interest. | |
| decidable | Def Dec(P) == P P |
| Thm* A:Prop. Dec(A) Prop | |
| pi1 | Def 1of(t) == t.1 |
| Thm* A:Type, B:(AType), p:(a:AB(a)). 1of(p) A | |
| pi2 | Def 2of(t) == t.2 |
| Thm* A:Type, B:(AType), p:(a:AB(a)). 2of(p) B(1of(p)) |
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