Excluding predictable null events at every jump atom #
The predictable bad slope event is null at deterministic levels: the full-filter finite-reading estimate gives the dyadic extended-reading estimate at each fixed positive level, all conversions taking place on the common finite-passage event.
General predictable compensation on finite level and lifetime boxes then excludes a predictable event that is null at each deterministic positive level. Countable exhaustion retains every excursion atom on one host event.
theorem
BGW.StableTrees.ae_notMem_excursionHeightLeftSlopeBad
{θ : ℝ}
(hθ : 1 < θ ∧ θ ≤ 2)
(x : NNReal)
(hx : 0 < x)
:
∀ᵐ (f : Skorokhod.DLoc) ∂↑(stableLocalLaw θ), (x, f) ∉ excursionHeightLeftSlopeBad
The bad predictable left-slope event has probability zero at every fixed positive level.
theorem
BGW.StableTrees.ae_avoid_predictable_event_at_jumps
{θ : ℝ}
(hθ : 1 < θ ∧ θ ≤ 2)
{B : Set (NNReal × Skorokhod.DLoc)}
(hB : MeasurableSet B)
(hnull : ∀ (x : NNReal), 0 < x → ∀ᵐ (f : Skorokhod.DLoc) ∂↑(stableLocalLaw θ), (x, f) ∉ B)
:
∀ᵐ (f : Skorokhod.DLoc) ∂↑(stableLocalLaw θ), ∀ x ∈ passageJumpSet f, (x, f) ∉ B
Predictable events null at each positive deterministic level occur at no jump atom.
theorem
BGW.StableTrees.ae_no_bad_leftSlope_at_jumps
{θ : ℝ}
(hθ : 1 < θ ∧ θ ≤ 2)
:
∀ᵐ (f : Skorokhod.DLoc) ∂↑(stableLocalLaw θ), ∀ x ∈ passageJumpSet f, (x, f) ∉ excursionHeightLeftSlopeBad
Almost surely every excursion jump atom has a vanishing dyadic left passage slope.