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Proof step 1 from proof mod-next-square (conclusion)

⊦ (i ^ 2 * (i + 1) ^ 2) % 4 = 0

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ i ^ 2 = i * i
Proof step 3:
⊦ ((i * i) * (i + 1) ^ 2) % 4 = 0

Rule argument

spec: int-pot inst: name: pot-square-04 seq: ⊦ i ^ 2 = i * i subst: [i] → [i] flags: rewrite, current

Additional information

Used terms: i