Inverse-polynomial tiny-cover compatibility
Lax342547.TinyCompatibility · concepts/Lax342547/TinyCompatibility.lean · lax-342547
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Lemma
The actual binary pairing kernel of rank at most dN has compatible pair mass at least 1/(4(1+d*N)^4) under any finite probability law with zero diagonal.
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| 1 | import Lax342547.HadamardRank |
| 2 | import Lax342547.PairPositions |
| 3 | |
| 4 | /-! |
| 5 | --- |
| 6 | title: Inverse-polynomial tiny-cover compatibility |
| 7 | type: lemma |
| 8 | --- |
| 9 | The actual binary pairing kernel of rank at most d*N has compatible pair mass at least 1/(4*(1+d*N)^4) under any finite probability law with zero diagonal. |
| 10 | -/ |
| 11 | |
| 12 | namespace Lax342547.TinyCompatibility |
| 13 | |
| 14 | open Lax342547.MomentSpace Lax342547.RelativeEntropy Lax342547.CellAveraging |
| 15 | |
| 16 | axiom tiny_compatible_mass {Ω : Type} [Fintype Ω] [DecidableEq Ω] |
| 17 | (μ : Ω → ℝ) (F : Matrix Ω Ω Binary) (hμ : Probability μ) (hdiag : ∀ a, F a a = 0) : |
| 18 | 1/(((1+F.rank)^2+1 : ℕ) : ℝ)^2 ≤ pairEventMass μ μ (fun a b => F a b = 0 ∧ F b a = 0) |
| 19 | |
| 20 | axiom tiny_compatible_mass_rank_bound {Ω : Type} [Fintype Ω] [DecidableEq Ω] |
| 21 | (μ : Ω → ℝ) (F : Matrix Ω Ω Binary) (d N : ℕ) |
| 22 | (hμ : Probability μ) (hdiag : ∀ a, F a a = 0) (hrank : F.rank ≤ d*N) : |
| 23 | 1/(4*(1+(d : ℝ)*N)^4) ≤ pairEventMass μ μ (fun a b => F a b = 0 ∧ F b a = 0) |
| 24 | |
| 25 | end Lax342547.TinyCompatibility |
| 26 |
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