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Proof step 5 from proof sqrt-exact-def (previous step)

isSquare(dec) ⊦ sqrt(dec, i) = mkDecimal(sqrt(dec.int), dec.scale / 2), even(dec.scale)

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: inst: name: isSquare-scale seq: ⊦ isSquare(dec) → even(dec.scale) subst: [dec] → [dec] flags: rewrite, current

Additional information

Used terms: dec