Q == (P 
Q) & (P Q)
A,B:Prop. (A B) 
Prop
B == {fg:((A
B)
(BA))| fg/f,g. InvFuns(A;B;f;g) }A,B:Type. AB Type
f:(AB), g:(BA). InvFuns(A;B;f;g)A,B:Type. (A ~ B) Prop| Some definitions of interest. | |
| iff | Q == (P Q) & (P Q) |
| A,B:Prop. (A B) Prop | |
| inv_pair | B == {fg:((AB)(BA))| fg/f,g. InvFuns(A;B;f;g) } |
| A,B:Type. AB Type | |
| one_one_corr_2 | f:(AB), g:(BA). InvFuns(A;B;f;g) |
| A,B:Type. (A ~ B) Prop |
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