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Proof step 2 from proof square-eq-03 (previous step)

m * (m + m0) = n * (n + m0) ⊦ m = n

User applied rule cut formula

And obtained the following new goals

Proof step 3:
m < n, m * (m + m0) = n * (n + m0) ⊦ m = n
Proof step 5:
m * (m + m0) = n * (n + m0) ⊦ m < n, m = n

Rule argument

fma: m < n

Additional information

Used formulas: m < n