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Proof step 4 from proof scale-not-neg (previous step)

mkDecimal(i, i0).scale < 0, ∀ i1, i0. i→n(i1) < i→n(i) → mkDecimal(i1, i0).scale < 0 → false ⊦ false

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
mkDecimal(i, i0).scale < 0, ∀ i1, i0. i→n(i1) < i→n(i) → mkDecimal(i1, i0).scale < 0 → false ⊦

Rule argument

Additional information

Used simplifier rules: forward-le-02: ⊦ j < i ∧ i ≤ 0 → j < 0; (forward) from specification int-abs