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Step * 1 of Lemma concat-is-nil


1. T : Type
⊢ uiff([] = [] ∈ (T List);(∀L∈[].L = [] ∈ (T List)))
BY
{ (Auto THEN Try ((BLemma `l_all_nil` THEN Auto)))⋅ }

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Latex:

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Latex:

1.  T  :  Type
\mvdash{}  uiff([]  =  [];(\mforall{}L\mmember{}[].L  =  []))


By

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Latex:
(Auto  THEN  Try  ((BLemma  `l\_all\_nil`  THEN  Auto)))\mcdot{}

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