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Proof step 19 from proof leninv-inf (previous step)

# nσ = ∞, m0 < m1, nσ[m] < nσ[m0], stutf(nσ) ⊦ nσ[m1] = nσ[m0], m < m0 ∧ nσ[m] < nσ[m0]

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
# nσ = ∞, nσ[m] < nσ[m0], m0 < m1, stutf(nσ), m0 ≤ m ⊦ nσ[m1] = nσ[m0]

Rule argument

Additional information

Used simplifier rules: ⊦ m < n ↔ ¬ n ≤ m; (ss)