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Proof step 30 from proof bib-on-bits (previous step)

# int2bits(i) < 8, i ≤ 0 ⊦ b2i(i2b(bits2int(lastn(8, int2bits(i))))) = bits2int(lastn(8, fillsgn(8, int2bits(i)))), i ∈byte

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

seq: ⊦ i < ~1 → (# int2bits(i) < m ↔ 0 ≤ i + 2 ^ (n→i(m) - 2)) subst: [m, i] → [8, i] rotate: F spec: int2bits inst: name: int2bits-lslen-03

Additional information

Used terms: 8, i