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Proof step 117 from proof lim-exists (previous step)

ii(n0 + 1) = ii(n0) + # lf(n0), # σσ = ∞, ii(0) = 0, n < ii(n0 + 1), mon(σσ), ii(n0) ≤ n, ii(n0) < ii(n0 + 1), ∀ m, n. m ≤ n → ii(m) ≤ ii(n), ∀ n. ∃ m. ii(m) ≤ n ∧ n < ii(m + 1) ⊦ # σσ[0] = ∞, σσ = [], ii(n0 + 1) = 0, ((nf from ii(n0)) to # lf(n0))[n - ii(n0)] = nf(n), lf(n0) = [], ∃ n. # σσ[n] = ∞

Heuristic elimination applied rule insert elim lemma

And closed the goal!

Rule argument

spec: nat inst: name: elim-sub seq: n ≤ m ⊦ n0 = m - n ↔ m = n0 + n subst: [m, n, n0] → [n, ii(n0), n1] flags:

Additional information

Used simplifier rules: lels: ⊦ ¬ m < n ↔ n ≤ m; from specification nat%lep: ⊦ m ≤ m + n; from specification nat%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic2%c: ⊦ m + n = n + m; from specification nat-basic2%lf-01: ⊦ m < n ∧ n = n0 → m < n0; (forward) from specification nat-basic1%l: ⊦ m + n < m + n0 ↔ n < n0; from specification nat-basic2%le-ls-simp: ⊦ m ≤ n → (n < m ↔ false); from specification nat%get-infto: m < n ⊦ (nf to n)[m] = nf(m); from specification stream%get-from-inf: ⊦ ((nf from n))(m) = nf(m + n); from specification stream%n ≤ m ⊦ n0 = m - n ↔ m = n0 + n; (elim) Used terms: n, ii(n0), n1