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Proof step 45 from proof byte-law-and-one (previous step)

# int2bits(i) < 8 ⊦ lastn(8, fillsgn(8, bitsand(int2bits(i), int2bits(j)))) = lastn(8, fillsgn(8, bitsand(lastn(8, fillsgn(8, int2bits(i))), int2bits(j)))), bitsand(lastn(8, fillsgn(8, int2bits(i))), int2bits(j)) = []

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

seq: ⊦ n = # bits → lastn(n, bits) = bits subst: [bits, n] → [fillsgn(8, int2bits(i)), 8] rotate: F spec: list-del inst: bitlista name: lastN-all

Additional information

Used terms: fillsgn(8, int2bits(i)), 8