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Proof step 4 from proof ex-mkDecimal (previous step)

dec = mkDecimal(dec.int, dec.scale) ⊦ dec = mkDecimal(dec.int, dec.scale) ∧ 0 ≤ dec.scale

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: scale-not-neg: ⊦ ¬ dec.scale < 0;%lels-01: ⊦ ¬ i ≤ j ↔ j < i; from specification int-abs