b == if b
True else False fi
b:
. b 
PropDef == Refl(T;x,y.E(x;y)) & (Sym x,y:T. E(x;y)) & (Trans x,y:T. E(x;y))
T:Type, E:(T
TProp). (EquivRel x,y:T. E(x,y)) Prop
Q == (P 
Q) & (P Q)A,B:Prop. (A B) Prop| Some definitions of interest. | |
| assert | b == if b True else False fi |
| b:. b Prop | |
| equiv_rel | Def == Refl(T;x,y.E(x;y)) & (Sym x,y:T. E(x;y)) & (Trans x,y:T. E(x;y)) |
| T:Type, E:(TTProp). (EquivRel x,y:T. E(x,y)) Prop | |
| iff | Q == (P Q) & (P Q) |
| A,B:Prop. (A B) Prop |
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