Step * 1 of Lemma discrete-equiv-iff


1. Type
2. Type
3. {() ⊢ _:Equiv(discr(A);discr(B))}
⊢ B
BY
(RenameVar `e' (-1) THEN UseWitness ⌜<equiv-bijection(e), equiv-bijection-is(e)>⌝⋅}

1
1. Type
2. Type
3. {() ⊢ _:Equiv(discr(A);discr(B))}
⊢ <equiv-bijection(e), equiv-bijection-is(e)> ∈ 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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