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Proof step 1 from proof longshiftright-def-unbounded (conclusion)

⊦ j l>> i = j >> band(i, 63)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ i l>> j = bits2int(sublist(0, # int2bits(i), mklist(int2bits(i).first, i→n(band(j, 63))) + int2bits(i)))
Proof step 3:
⊦ bits2int(sublist(0, # int2bits(j), mklist(int2bits(j).first, i→n(band(i, 63))) + int2bits(j))) = j >> band(i, 63)

Rule argument

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

Additional information

Used terms: i, j