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Proof step 3 from proof scale-abs (previous step)

⊦ mkDecimal(abs(dec.int), dec.scale).scale = dec.scale

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 4:
⊦ ¬ j < 0 → abs(j) = j
Proof step 5:
¬ ¬ dec.int < 0 ⊦ mkDecimal(abs(dec.int), dec.scale).scale = dec.scale
Proof step 8:
¬ dec.int < 0 ⊦ mkDecimal(dec.int, dec.scale).scale = dec.scale

Rule argument

spec: int-abs inst: name: Abs-pos seq: ⊦ ¬ j < 0 → abs(j) = j subst: [j] → [dec.int] flags: rewrite

Additional information

Used terms: dec.int