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Step * 1 of Lemma append_comm_1


1. T : Type
2. a : T
⊢ [a] ≡(T) [a]
BY
{ (RelRST THEN Auto) }

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Latex:

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Latex:

1.  T  :  Type
2.  a  :  T
\mvdash{}  [a]  \mequiv{}(T)  [a]


By

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Latex:
(RelRST  THEN  Auto)

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