| Who Cites is one one corr? |
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is_one_one_corr | Def f is 1-1 corr == g:(B A). InvFuns(A;B;f;g) |
| | Thm* A,B:Type, f:(A B). (f is 1-1 corr) Prop |
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inv_funs_2 | Def InvFuns(A;B;f;g) == ( x:A. g(f(x)) = x) & ( y:B. f(g(y)) = y) |
| | Thm* f:(A B), g:(B A). InvFuns(A;B;f;g) Prop |