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Proof step 2 from proof dec2int-not-neg (previous step)

mkDecimal(0, 0) ≤ dec, dec2int(dec) < 0 ⊦

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ dec2int(dec) = dec.int / 10 ^ dec.scale
Proof step 4:
mkDecimal(0, 0) ≤ dec, dec.int / 10 ^ dec.scale < 0 ⊦

Rule argument

spec: decimal inst: name: dec2int-def seq: ⊦ dec2int(dec) = dec.int / 10 ^ dec.scale subst: [dec] → [dec] flags: rewrite

Additional information

Used terms: dec