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Step * 2 of Lemma vr_test_foo_bar345566

.....subterm..... T:t
1:n
1. x : {3..7-}@i
⊢ x ∈ ℕ7 ⋂ {3..9-}
BY
{ ((D 1 THEN Auto) THEN Isect2CD THEN Auto) }

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Latex:

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Latex:
.....subterm.....  T:t
1:n
1.  x  :  \{3..7\msupminus{}\}@i
\mvdash{}  x  \mmember{}  \mBbbN{}7  \mcap{}  \{3..9\msupminus{}\}


By

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Latex:
((D  1  THEN  Auto)  THEN  Isect2CD  THEN  Auto)

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