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Proof step 15 from proof shiftzero-minus-one (previous step)

~1 + 1 = 0 ⊦ j = 0, n = 0, bits2int(firstn(# fillsgn(n, true '), mklist(false, i→n(j)) + fillsgn(n, true '))) = bits2int(firstn(1 + n, mklist(false, i→n(j)) + false ' + mklist(true, n)))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 16:
⊦ j = 0, n = 0, bits2int(firstn(# fillsgn(n, true '), mklist(false, i→n(j)) + fillsgn(n, true '))) = bits2int(firstn(1 + n, mklist(false, i→n(j)) + false ' + mklist(true, n)))

Proof step 15 from proof shiftzero-minus-one (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information