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Proof step 1 from proof shiftright-minus-one (conclusion)

⊦ ~1 >> j = ~1

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ i >> j = bits2int(sublist(0, # int2bits(i), mklist(int2bits(i).first, i→n(j)) + int2bits(i)))
Proof step 3:
⊦ bits2int(sublist(0, # int2bits(~1), mklist(int2bits(~1).first, i→n(j)) + int2bits(~1))) = ~1

Rule argument

name: shiftrsign-01 rotate: F subst: [j, i] → [j, ~1]

Additional information

Used terms: j, ~1