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Proof step 6 from proof divi-two-01 (previous step)

2 * n = m + 2 ⊦ ∃ n0. 2 * n0 = m

User applied rule exists right

And obtained the following new goals

Proof step 7:
2 * n = m + 2 ⊦ 2 * (n - 1) = m, ∃ n0. 2 * n0 = m

Rule argument

pos: right 1 terms: n - 1 abort: F discard: F computed: F

Additional information

Used terms: n - 1