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Step * of Lemma trivial-member-add-name2

∀I:fset(ℕ). ∀i:ℕ.  ∀[j:ℕ]. i ∈ I+i+j
BY
{ (Auto THEN BLemma `fset-member-add-name` THEN Auto) }

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Latex:

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Latex:
\mforall{}I:fset(\mBbbN{}).  \mforall{}i:\mBbbN{}.    \mforall{}[j:\mBbbN{}].  i  \mmember{}  I+i+j


By

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Latex:
(Auto  THEN  BLemma  `fset-member-add-name`  THEN  Auto)

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