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Proof step 7 from proof mkDecimal-negated (previous step)

⊦ mkDecimal(i, j).int + mkDecimal(~ mkDecimal(i, j).int, mkDecimal(i, j).scale).int = 0 ∧ mkDecimal(mkDecimal(i, j).int, mkDecimal(i, j).scale).scale = mkDecimal(i, j).scale

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 8:
⊦ mkDecimal(dec.int, dec.scale) = dec
Proof step 9:
⊦ mkDecimal(i, j).int + mkDecimal(~ mkDecimal(i, j).int, mkDecimal(i, j).scale).int = 0 ∧ mkDecimal(i, j).scale = mkDecimal(i, j).scale

Rule argument

spec: inst: name: mkDecimal-constructor seq: ⊦ mkDecimal(dec.int, dec.scale) = dec subst: [dec] → [mkDecimal(i, j)] flags: rewrite, current

Additional information

Used terms: mkDecimal(i, j)