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(function f is a one-to-one correspondence)

Who Cites is one one corr?
is_one_one_corrDef  f is 1-1 corr == g:(BA). InvFuns(A;B;f;g)
Thm*  A,B:Type, f:(AB). (f is 1-1 corr)  Prop
inv_funs_2Def  InvFuns(A;B;f;g) == (x:Ag(f(x)) = x) & (y:Bf(g(y)) = y)
Thm*  f:(AB), g:(BA). InvFuns(A;B;f;g Prop

Syntax:f is 1-1 corr has structure: is_one_one_corr(ABf)

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applyfunctionuniverseequalmemberprop
andallexists!abstraction
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WhoCites Definitions DiscreteMath Sections DiscrMathExt Doc