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Proof step 9 from proof two-minus (previous step)

i < 0, 2 ^ ~ i ≤ 1 ⊦ 1 / 2 ^ ~ i = 0

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: <toplevel> name: notone seq: ⊦ 1 < i ∧ 0 < j → ¬ i ^ j ≤ 1 subst: [j, i] → [~ i, 2] flags: <all paths>

Additional information

Used simplifier rules: ⊦ 0 < ~ i ↔ i < 0; (s) Used terms: ~ i, 2