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Proof step 6 from proof lsleninv-1 (previous step)

⌜0⌝ = leninv(nσ), stutf(nσ), ⌜m⌝ < # nσ, n < nσ[m] ⊦

User applied rule flip equation

And obtained the following new goals

Proof step 7:
leninv(nσ) = ⌜0⌝ , stutf(nσ), ⌜m⌝ < # nσ, n < nσ[m] ⊦

Rule argument

pos: left 1

Additional information