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Proof step 4 from proof two-plus (previous step)

⊦ i * i + j * j = i ^2 + j ^2

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ i ^2 = i * i
Proof step 6:
⊦ i * i + j * j = i * i + j ^2

Rule argument

spec: int-square inst: name: Square-def seq: ⊦ i ^2 = i * i subst: [i] → [i] flags: rewrite, current

Additional information

Used terms: i