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Step * 1 of Lemma concat-map-decide


1. T : Type
2. B : T ⟶ (Top + Top)
⊢ [] ~ []
BY
{ xxxAutoxxx }

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Latex:

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Latex:

1.  T  :  Type
2.  B  :  T  {}\mrightarrow{}  (Top  +  Top)
\mvdash{}  []  \msim{}  []


By

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Latex:
xxxAutoxxx

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