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Proof step 12 from proof uint2bits-pred (previous step)

uint2bits(j / 2 - 1) = sgn(bitsinvert(bitsinvert(uint2bits(j / 2)) +1)), j % 2 = 0, 1 < j, 0 < j, 0 ≤ j, ∀ j0. i→n(j0) < i→n(j) → 0 < j0 → uint2bits(j0 - 1) = sgn(bitsinvert(bitsinvert(uint2bits(j0)) +1)) ⊦ uint2bits(j / 2 - 1) + ((j - 1) % 2 = 1)' = sgn(bitsinvert(bitsinvert(uint2bits(j / 2)) +1) + true '), j = 2

User applied rule insert equation

And obtained the following new goals

Rule argument

pos: left 1 flags: discard

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