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Proof step 9 from proof add-eq2pot (previous step)

2 ^ (i1 + i0) = 2 ^ i0 + j, i1 < 0, 0 ≤ i1 + i0, 0 ≤ i0, 0 ≤ j ⊦

User applied rule cut formula

And obtained the following new goals

Rule argument

fma: 2 ^ (i1 + i0) < 2 ^ i0

Additional information

Used simplifier rules: ls-pos-2pot: ⊦ 0 ≤ j → (2 ^ j < 2 ^ j0 ↔ j < j0);%ls: ⊦ i + j < j ↔ i < 0; from specification int-basic2%zero-gels-01: ⊦ i < 0 ∧ 0 ≤ j → i < j; from specification int-abs%add-a: ⊦ i + j + i0 = (i + j) + i0; from specification int-basic2%add-c: ⊦ i + j = j + i; from specification int-basic2 Used formulas: 2 ^ (i1 + i0) < 2 ^ i0