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Proof step 46 from proof eq-leninv (previous step)

m + 1 = nσ[n], # nσ = ∞, stutf(nσ), ∀ m0. n < m0 → nσ[m0] = nσ[n] ⊦ nσ[n] = 0, ⌜nσ[n]⌝ = leninv(nσ)

User applied rule insert equation

And obtained the following new goals

Proof step 47:
m + 1 = nσ[n], # nσ = ∞, stutf(nσ), ∀ m0. n < m0 → nσ[m0] = m + 1 ⊦ m + 1 = 0, ⌜m + 1⌝ = leninv(nσ)

Rule argument

pos: left 1 flags: rotate

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