OAI/NumberTheory/JointDickman/Probability/FrozenSiteLaw.lean

GitHub source file

6 declarations, 0 contain sorry, 0 declared as axioms

Conditioning on a fixed collection of sampled sites

  1. def OAI.JointDickman.frozenSiteMass line 13

    Source documentation

    Sampled coordinates are fixed; every other coordinate keeps its law.

    noncomputable def frozenSiteMass (p : ι → A → ℝ) (J : Finset ι) (t : ι → A)
        (i : ι) (a : A) : ℝ :=
    …
  2. theorem OAI.JointDickman.frozenSiteMass_nonneg line 18
  3. theorem OAI.JointDickman.frozenSiteMass_sum line 25
  4. theorem OAI.JointDickman.frozenSiteMass_average line 30
  5. theorem OAI.JointDickman.frozenSiteMass_support line 45
  6. theorem OAI.JointDickman.frozenSiteMass_disintegrate line 56

    Source documentation

    Averaging the conditional law recovers the original law. The test may depend on the fixed types, provided only their sampled coordinates matter.

    theorem frozenSiteMass_disintegrate (p : ι → A → ℝ)
        (hpone : ∀ i, ∑ a, p i a = 1) (J : Finset ι)
        (F : (ι → A) → (ι → A) → ℝ)
        (hF : ∀ t x, (∀ i ∈ J, x i = t i) → F t x = F x x) :
        finiteExpectation (siteProductMass p) (fun x => F x x) =
          finiteExpectation (siteProductMass p) (fun t =>
            finiteExpectation (siteProductMass (frozenSiteMass p J t)) (F t)) := by
    …

    Mentions: OAI.JointDickman.finiteExpectation, OAI.JointDickman.frozenSiteMass