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Proof step 4 from proof square-le-06 (previous step)

i * i ≤ i + 1 ⊦ i = 0, i = 1

User applied rule cut formula

And obtained the following new goals

Proof step 5:
i < 0, i * i ≤ i + 1 ⊦ i = 0, i = 1
Proof step 7:
i * i ≤ i + 1 ⊦ i < 0, i = 0, i = 1

Rule argument

fma: i < 0

Additional information

Used formulas: i < 0