Who Cites one one corr 2?
one_one_corr_2	Def  A ~ B == f:(AB), g:(BA). InvFuns(A;B;f;g)
	Thm*  A,B:Type. (A ~ B)  Prop
inv_funs_2	Def  InvFuns(A;B;f;g) == (x:A. g(f(x)) = x) & (y:B. f(g(y)) = y)
	Thm*  f:(AB), g:(BA). InvFuns(A;B;f;g)  Prop

Syntax:

A ~ B

has structure:

one_one_corr_2(A; B)

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