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Proof step 3 from proof power-of-2-01 (previous step)

⊦ 4 * 2 ^ m / 2 = 2 * 2 ^ m, 2 ^ m = 1, n = 0

User applied rule cut formula

And obtained the following new goals

Proof step 4:
4 = 2 * 2 ⊦ 4 * 2 ^ m / 2 = 2 * 2 ^ m, 2 ^ m = 1, n = 0

Rule argument

fma: 4 = 2 * 2

Additional information

Used formulas: 4 = 2 * 2