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Proof step 2 from proof intshiftleft-num (previous step)

⊦ i i<< j = bits2int(int2bits(i) + mklist(false, i→n(band(j, 31))))

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

name: intshiftleft rotate: F subst: [j, i] → [j, i]

Additional information

Used simplifier rules: band-commutativity: ⊦ band(i, j) = band(j, i); Used terms: j, i