One common continuous stable height process #
Moment bounds construct a continuous modification. Rational agreement identifies it with
heightLoc, reconstructed from heightUniv. Literal prefix locality and uniqueness imply
one graph event for all horizons. The compact walk/height law is its graph pushforward.
theorem
BGW.StableTrees.ae_heightPrefix_restrict_all
{θ : ℝ}
(hθ : 1 < θ ∧ θ ≤ 2)
:
∀ᵐ (f : Skorokhod.DLoc) ∂↑(stableLocalLaw θ), ∀ (T : NNReal) (t : ↑(Set.Icc 0 ↑T)), (heightPrefix θ T (Skorokhod.DLoc.restrict T f)) t = heightLoc θ f ⟨↑t, ⋯⟩
Graph identity on one event for all horizons (CT8 blueprint §2 item 3).
theorem
BGW.StableTrees.ae_heightPrefix_restrict
{θ : ℝ}
(hθ : 1 < θ ∧ θ ≤ 2)
(T : NNReal)
:
∀ᵐ (f : Skorokhod.DLoc) ∂↑(stableLocalLaw θ), ∀ (t : ↑(Set.Icc 0 ↑T)), (heightPrefix θ T (Skorokhod.DLoc.restrict T f)) t = heightLoc θ f ⟨↑t, ⋯⟩
Graph identity: almost surely, on every time of [0,T], the prefix map applied to the
restriction of the path is the continuous height.
theorem
BGW.StableTrees.ae_heightPrefix_eval
{θ : ℝ}
(hθ : 1 < θ ∧ θ ≤ 2)
(T : NNReal)
(t : ↑(Set.Icc 0 ↑T))
:
∀ᵐ (f : Skorokhod.DLoc) ∂↑(stableLocalLaw θ), (heightPrefix θ T (Skorokhod.DLoc.restrict T f)) t = height θ f ⟨↑t, ⋯⟩
Fixed-time evaluation of the prefix map is H02's height a.s.
theorem
BGW.StableTrees.map_heightPrefix_pair
{θ : ℝ}
(hθ : 1 < θ ∧ θ ≤ 2)
(T : NNReal)
:
MeasureTheory.Measure.map
(fun (f : Skorokhod.DLoc) => (Skorokhod.DLoc.restrict T f, heightPrefix θ T (Skorokhod.DLoc.restrict T f)))
↑(stableLocalLaw θ) = MeasureTheory.Measure.map (fun (g : Skorokhod.D ↑T ℝ) => (g, heightPrefix θ T g)) ↑(stableProcessLaw θ ↑T)
Pair law: the walk/height pair on [0,T] is the graph pushforward of the stable process
law on [0,T] (all T, including T = 0).