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Atlas.NumberTheoryI.code.StieltjesIntegral

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      noncomputable def RiemannStieltjes.stieltjesSum {a b : ℝ} {𝕜 : Type u_1} [NormedField 𝕜] (PT : TaggedPartition a b) (f g : ℝ → 𝕜) :
      𝕜
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        def RiemannStieltjes.HasStieltjesIntegral {𝕜 : Type u_1} [NormedField 𝕜] (f g : ℝ → 𝕜) (a b : ℝ) (S : 𝕜) :
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          def RiemannStieltjes.StieltjesIntegrable {𝕜 : Type u_1} [NormedField 𝕜] (f g : ℝ → 𝕜) (a b : ℝ) :
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              theorem RiemannStieltjes.hasStieltjesIntegral_unique {a b : ℝ} {𝕜 : Type u_1} [NormedField 𝕜] {f g : ℝ → 𝕜} {S₁ S₂ : 𝕜} (h₁ : HasStieltjesIntegral f g a b S₁) (h₂ : HasStieltjesIntegral f g a b S₂) :
              S₁ = S₂
              noncomputable def RiemannStieltjes.stieltjesIntegral {𝕜 : Type u_1} [NormedField 𝕜] (f g : ℝ → 𝕜) (a b : ℝ) :
              𝕜
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                theorem RiemannStieltjes.stieltjesIntegral_spec {a b : ℝ} {𝕜 : Type u_1} [NormedField 𝕜] {f g : ℝ → 𝕜} (h : StieltjesIntegrable f g a b) :
                def RiemannStieltjes.IsBoundedVariation {𝕜 : Type u_1} [NormedField 𝕜] (f : ℝ → 𝕜) (a b : ℝ) :
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                  theorem RiemannStieltjes.stieltjes_eq_riemann (f g g' : ℝ → ℝ) (a b : ℝ) (hg : ∀ x ∈ Set.Icc a b, HasDerivAt g (g' x) x) (hg' : ContinuousOn g' (Set.Icc a b)) (hint : StieltjesIntegrable f g a b) :
                  stieltjesIntegral f g a b = ∫ (x : ℝ) in a..b, f x * g' x
                  noncomputable def RiemannStieltjes.cumRefine {a b : ℝ} (P : ℕ → IntervalPartition a b) (cr : ∀ (Q R : IntervalPartition a b), ∃ (S : IntervalPartition a b), S.IsRefinementOf Q ∧ S.IsRefinementOf R) :
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                    theorem RiemannStieltjes.cumRefine_refines_prev {a b : ℝ} (P : ℕ → IntervalPartition a b) (cr : ∀ (Q R : IntervalPartition a b), ∃ (S : IntervalPartition a b), S.IsRefinementOf Q ∧ S.IsRefinementOf R) (n : ℕ) :
                    (cumRefine P cr (n + 1)).IsRefinementOf (cumRefine P cr n)
                    theorem RiemannStieltjes.cumRefine_refines_P {a b : ℝ} (P : ℕ → IntervalPartition a b) (cr : ∀ (Q R : IntervalPartition a b), ∃ (S : IntervalPartition a b), S.IsRefinementOf Q ∧ S.IsRefinementOf R) (n : ℕ) :
                    (cumRefine P cr (n + 1)).IsRefinementOf (P (n + 1))
                    theorem RiemannStieltjes.cumRefine_refines_P_le {a b : ℝ} (P : ℕ → IntervalPartition a b) (cr : ∀ (Q R : IntervalPartition a b), ∃ (S : IntervalPartition a b), S.IsRefinementOf Q ∧ S.IsRefinementOf R) (n k : ℕ) (hk : k ≤ n) :
                    (cumRefine P cr n).IsRefinementOf (P k)
                    theorem RiemannStieltjes.integrable_of_cauchy (f g : ℝ → ℝ) (a b : ℝ) (hcauchy : ∀ ε > 0, ∃ (P : IntervalPartition a b), ∀ (PT₁ PT₂ : TaggedPartition a b), PT₁.IsRefinementOf P → PT₂.IsRefinementOf P → ‖stieltjesSum PT₁ f g - stieltjesSum PT₂ f g‖ < ε) :
                    theorem RiemannStieltjes.cauchyStieltjes (f g : ℝ → ℝ) (a b : ℝ) (hf_bv : IsBoundedVariation f a b) (hg_bv : IsBoundedVariation g a b) (hf_left : ∀ c ∈ Set.Icc a b, Filter.Tendsto f (nhdsWithin c (Set.Iio c)) (nhds (f c))) (hg_right : ∀ c ∈ Set.Icc a b, Filter.Tendsto g (nhdsWithin c (Set.Ioi c)) (nhds (g c))) (ε : ℝ) :
                    ε > 0 → ∃ (P : IntervalPartition a b), ∀ (PT₁ PT₂ : TaggedPartition a b), PT₁.IsRefinementOf P → PT₂.IsRefinementOf P → ‖stieltjesSum PT₁ f g - stieltjesSum PT₂ f g‖ < ε
                    theorem RiemannStieltjes.stieltjesIntegrable_of_boundedVariation (f g : ℝ → ℝ) (a b : ℝ) (hf_bv : IsBoundedVariation f a b) (hg_bv : IsBoundedVariation g a b) (hf_left : ∀ c ∈ Set.Icc a b, Filter.Tendsto f (nhdsWithin c (Set.Iio c)) (nhds (f c))) (hg_right : ∀ c ∈ Set.Icc a b, Filter.Tendsto g (nhdsWithin c (Set.Ioi c)) (nhds (g c))) :
                    theorem RiemannStieltjes.fin_sum_telescope {n : ℕ} (g : Fin (n + 1) → ℝ) :
                    ∑ i : Fin n, (g ⟨↑i + 1, ⋯⟩ - g ⟨↑i, ⋯⟩) = g ⟨n, ⋯⟩ - g ⟨0, ⋯⟩