Step
*
1
of Lemma
discrete-equiv-iff
1. A : Type
2. B : Type
3. {() ⊢ _:Equiv(discr(A);discr(B))}
⊢ A ~ B
BY
{ (RenameVar `e' (-1) THEN UseWitness ⌜<equiv-bijection(e), equiv-bijection-is(e)>⌝⋅) }
1
1. A : Type
2. B : Type
3. e : {() ⊢ _:Equiv(discr(A);discr(B))}
⊢ <equiv-bijection(e), equiv-bijection-is(e)> ∈ A ~ B
Latex:
Latex:
1. A : Type
2. B : Type
3. \{() \mvdash{} \_:Equiv(discr(A);discr(B))\}
\mvdash{} A \msim{} B
By
Latex:
(RenameVar `e' (-1) THEN UseWitness \mkleeneopen{}<equiv-bijection(e), equiv-bijection-is(e)>\mkleeneclose{}\mcdot{})
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