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Proof step 3 from proof lemma-ax2 (previous step)

n +1 = n + 1 ⊦ 2^(n + 1) = 2 * 2^ n

User applied rule insert equation

And obtained the following new goals

Proof step 4:
⊦ 2^ n +1 = 2 * 2^ n

Rule argument

pos: left 1 flags: rotate, discard

Additional information