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Proof step 2 from proof two-minus (
previous step
)
⊦ j ^2 + i ^2 = (i - j)^2 + 2 * i * j
User applied rule insert rewrite lemma
And obtained the following new goals
Proof step 3
:
⊦ i ^2 = i * i
Proof step 4
:
⊦ j ^2 + i ^2 = (i - j) * (i - j) + 2 * i * j
Rule argument
spec: int-square inst: name: Square-def seq: ⊦ i ^2 = i * i subst: [i] → [i - j] flags: rewrite, current
Additional information
Used terms: i - j