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Proof step 47 from proof int2bytes-rec-neg-02 (previous step)

j % 2 ^ (i * 8) = ~1, 8 * i→n(i) = 0, 0 < i, j + 2 ^ (i * 8) < 0, j < 0, 0 ≤ i ⊦ 2 ^ (i * 8) = 0, fix(i→n(i) + 1, i2b(~1) ').rest = []

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 48:
⊦ m0 * m = 0 ↔ m0 = 0 ∨ m = 0

Rule argument

seq: ⊦ m0 * m = 0 ↔ m0 = 0 ∨ m = 0 subst: [m, m0] → [i→n(i), 8] rotate: F spec: nat-mult inst: name: zero-01

Additional information

Used simplifier rules: ⊦ i→n(i) = 0 ↔ i = 0;% ⊦ i % 1 = 0; Used terms: i→n(i), 8