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

⊦ abs(mkDecimal(i, i0)) * abs(mkDecimal(i, i0)) = mkDecimal(i, i0) * mkDecimal(i, i0)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 4:
⊦ abs(dec * dec0) = abs(dec) * abs(dec0)
Proof step 5:
⊦ abs(mkDecimal(i, i0) * mkDecimal(i, i0)) = mkDecimal(i, i0) * mkDecimal(i, i0)

Rule argument

spec: inst: name: mult-abs seq: ⊦ abs(dec * dec0) = abs(dec) * abs(dec0) subst: [dec0, dec] → [mkDecimal(i, i0), mkDecimal(i, i0)] flags: rewrite, current

Additional information

Used terms: mkDecimal(i, i0), mkDecimal(i, i0)