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Proof step 4 from proof bits2int-fill (previous step)

⊦ bits = [], bits2int(sgn(fillsgn(n, bits))) = bits2int(bits)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ bits ≠ [] → sgn(fillsgn(n, bits)) = sgn(bits)

Rule argument

seq: ⊦ bits ≠ [] → sgn(fillsgn(n, bits)) = sgn(bits) subst: [bits, n] → [bits, n] rotate: F spec: bitopsaux inst: name: sgn-fill

Additional information

Used simplifier rules: bits2int-sgn: ⊦ bits2int(sgn(bits)) = bits2int(bits); Used terms: bits, n