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Proof step 15 from proof byte-law-righthift-not (previous step)

i2b(0) = i2b(bits2int(sublist(0, n, int2bits(~128)))), # int2bits(~128) = n + i→n(bits2int(bitsand(int2bits(1), int2bits(31)))), # int2bits(128) ≤ i→n(bits2int(bitsand(int2bits(1), int2bits(31)))), i→n(bits2int(bitsand(int2bits(1), int2bits(31)))) < # int2bits(~128), # int2bits(128) < # int2bits(~128) ⊦ n = 0

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

seq: i < 0 ⊦ int2bits((* i)) = sgn(bitsinvert(uint2bits(abs(i))) +1) subst: [i] → [~128] rotate: F spec: int2bits inst: name: int2bits-neg-num

Additional information

Used terms: ~128