Theorem: ProbabilityTheory.IsRatCondKernelCDFAux.tendsto_zero_of_antitone
File: Mathlib/Probability/Kernel/Disintegration/CdfToKernel.lean

tactic: refine tendsto_of_integral_tendsto_of_antitone ?_ (integrable_const _) ?_ ?_ ?_
state_before: α : Type u_1
β : Type u_2
mα : MeasurableSpace α
mβ : MeasurableSpace β
κ : ↥(kernel α (β × ℝ))
ν : ↥(kernel α β)
f : α × β → ℚ → ℝ
hf : IsRatCondKernelCDFAux f κ ν
inst✝ : IsFiniteKernel ν
a : α
seq : ℕ → ℚ
hseq : Antitone seq
hseq_tendsto : Tendsto seq atTop atBot
⊢ ∀ᵐ (c : β) ∂ν a, Tendsto (fun m => f (a, c) (seq m)) atTop (𝓝 0)
state_after: case refine_1
α : Type u_1
β : Type u_2
mα : MeasurableSpace α
mβ : MeasurableSpace β
κ : ↥(kernel α (β × ℝ))
ν : ↥(kernel α β)
f : α × β → ℚ → ℝ
hf : IsRatCondKernelCDFAux f κ ν
inst✝ : IsFiniteKernel ν
a : α
seq : ℕ → ℚ
hseq : Antitone seq
hseq_tendsto : Tendsto seq atTop atBot
⊢ ∀ (n : ℕ), Integrable (fun c => f (a, c) (seq n)) (ν a)

case refine_2
α : Type u_1
β : Type u_2
mα : MeasurableSpace α
mβ : MeasurableSpace β
κ : ↥(kernel α (β × ℝ))
ν : ↥(kernel α β)
f : α × β → ℚ → ℝ
hf : IsRatCondKernelCDFAux f κ ν
inst✝ : IsFiniteKernel ν
a : α
seq : ℕ → ℚ
hseq : Antitone seq
hseq_tendsto : Tendsto seq atTop atBot
⊢ Tendsto (fun i => ∫ (a_1 : β), f (a, a_1) (seq i) ∂ν a) atTop (𝓝 (∫ (a : β), 0 ∂ν a))

case refine_3
α : Type u_1
β : Type u_2
mα : MeasurableSpace α
mβ : MeasurableSpace β
κ : ↥(kernel α (β × ℝ))
ν : ↥(kernel α β)
f : α × β → ℚ → ℝ
hf : IsRatCondKernelCDFAux f κ ν
inst✝ : IsFiniteKernel ν
a : α
seq : ℕ → ℚ
hseq : Antitone seq
hseq_tendsto : Tendsto seq atTop atBot
⊢ ∀ᵐ (a_1 : β) ∂ν a, Antitone fun i => f (a, a_1) (seq i)

case refine_4
α : Type u_1
β : Type u_2
mα : MeasurableSpace α
mβ : MeasurableSpace β
κ : ↥(kernel α (β × ℝ))
ν : ↥(kernel α β)
f : α × β → ℚ → ℝ
hf : IsRatCondKernelCDFAux f κ ν
inst✝ : IsFiniteKernel ν
a : α
seq : ℕ → ℚ
hseq : Antitone seq
hseq_tendsto : Tendsto seq atTop atBot
⊢ ∀ᵐ (a_1 : β) ∂ν a, ∀ (i : ℕ), 0 ≤ f (a, a_1) (seq i)

tactic: exact fun n ↦ hf.integrable a (seq n)
state_before: case refine_1
α : Type u_1
β : Type u_2
mα : MeasurableSpace α
mβ : MeasurableSpace β
κ : ↥(kernel α (β × ℝ))
ν : ↥(kernel α β)
f : α × β → ℚ → ℝ
hf : IsRatCondKernelCDFAux f κ ν
inst✝ : IsFiniteKernel ν
a : α
seq : ℕ → ℚ
hseq : Antitone seq
hseq_tendsto : Tendsto seq atTop atBot
⊢ ∀ (n : ℕ), Integrable (fun c => f (a, c) (seq n)) (ν a)
state_after: no goals

tactic: rw [integral_zero]
state_before: case refine_2
α : Type u_1
β : Type u_2
mα : MeasurableSpace α
mβ : MeasurableSpace β
κ : ↥(kernel α (β × ℝ))
ν : ↥(kernel α β)
f : α × β → ℚ → ℝ
hf : IsRatCondKernelCDFAux f κ ν
inst✝ : IsFiniteKernel ν
a : α
seq : ℕ → ℚ
hseq : Antitone seq
hseq_tendsto : Tendsto seq atTop atBot
⊢ Tendsto (fun i => ∫ (a_1 : β), f (a, a_1) (seq i) ∂ν a) atTop (𝓝 (∫ (a : β), 0 ∂ν a))
state_after: case refine_2
α : Type u_1
β : Type u_2
mα : MeasurableSpace α
mβ : MeasurableSpace β
κ : ↥(kernel α (β × ℝ))
ν : ↥(kernel α β)
f : α × β → ℚ → ℝ
hf : IsRatCondKernelCDFAux f κ ν
inst✝ : IsFiniteKernel ν
a : α
seq : ℕ → ℚ
hseq : Antitone seq
hseq_tendsto : Tendsto seq atTop atBot
⊢ Tendsto (fun i => ∫ (a_1 : β), f (a, a_1) (seq i) ∂ν a) atTop (𝓝 0)

tactic: exact hf.tendsto_integral_of_antitone a seq hseq hseq_tendsto
state_before: case refine_2
α : Type u_1
β : Type u_2
mα : MeasurableSpace α
mβ : MeasurableSpace β
κ : ↥(kernel α (β × ℝ))
ν : ↥(kernel α β)
f : α × β → ℚ → ℝ
hf : IsRatCondKernelCDFAux f κ ν
inst✝ : IsFiniteKernel ν
a : α
seq : ℕ → ℚ
hseq : Antitone seq
hseq_tendsto : Tendsto seq atTop atBot
⊢ Tendsto (fun i => ∫ (a_1 : β), f (a, a_1) (seq i) ∂ν a) atTop (𝓝 0)
state_after: no goals

tactic: filter_upwards [hf.mono a] with t ht using fun n m hnm ↦ ht (hseq hnm)
state_before: case refine_3
α : Type u_1
β : Type u_2
mα : MeasurableSpace α
mβ : MeasurableSpace β
κ : ↥(kernel α (β × ℝ))
ν : ↥(kernel α β)
f : α × β → ℚ → ℝ
hf : IsRatCondKernelCDFAux f κ ν
inst✝ : IsFiniteKernel ν
a : α
seq : ℕ → ℚ
hseq : Antitone seq
hseq_tendsto : Tendsto seq atTop atBot
⊢ ∀ᵐ (a_1 : β) ∂ν a, Antitone fun i => f (a, a_1) (seq i)
state_after: no goals

tactic: filter_upwards [hf.nonneg a] with c hc using fun i ↦ hc (seq i)
state_before: case refine_4
α : Type u_1
β : Type u_2
mα : MeasurableSpace α
mβ : MeasurableSpace β
κ : ↥(kernel α (β × ℝ))
ν : ↥(kernel α β)
f : α × β → ℚ → ℝ
hf : IsRatCondKernelCDFAux f κ ν
inst✝ : IsFiniteKernel ν
a : α
seq : ℕ → ℚ
hseq : Antitone seq
hseq_tendsto : Tendsto seq atTop atBot
⊢ ∀ᵐ (a_1 : β) ∂ν a, ∀ (i : ℕ), 0 ≤ f (a, a_1) (seq i)
state_after: no goals