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Proof step 37 from proof leninv-inf (previous step)

# nσ = ∞, stutf(nσ), ∀ m. ∃ m0. m < m0 ∧ nσ[m] < nσ[m0], n ≠ 0 → nσ[m] = n - 1 ∧ ¬(m < m0 → nσ[m0] = n - 1) ⊦ ∃ m. nσ[m] = n1, ∃ n1. n0 < n1 ∧ (∃ m. nσ[m] = n1 - 1 ∧ ¬(∀ m0. m < m0 → nσ[m0] = n1 - 1))

User applied rule weakening

And obtained the following new goals

Rule argument

poslist: left 4, right 2

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