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Proof step 6 from proof mininv-inverts-weak (previous step)

nσ ≠ [], min(nσ, n) = (# nσ).n, nσ[min(nσ, n)] < n, ⌜min(nσ, n)⌝ < # nσ, mon<(nσ), nσ[min(nσ, n) - 1] < n ⊦ n = 0, # nσ = ∞, nσ = []

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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