OAI/Geometry/RCD/Heat/HeatVarianceLower.lean
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An integrated reverse Poincaré estimate from the actual RCD heat flow
- theorem
OAI.RegularPointCoordinates.NoncollapsedRCD.heat_variance_lowerline 18Source documentation
The heat variance controls the gradient, with a uniform sufficient short-time curvature factor. The initial data are compact Lipschitz.
theorem NoncollapsedRCD.heat_variance_lower (K : ℝ) (n : ℕ) (hn : 2 ≤ n) (hX : NoncollapsedRCD K n X) {φ : X → ℝ} {L : ℝ≥0} (hφ : LipschitzWith L φ) (hφs : HasCompactSupport φ) (p : X) (f w : Lp ℝ 2 (hausdorff n X)) (hφf : φ =ᵐ[hausdorff n X] f) (C B : ℝ≥0) (hf : ∀ᵐ x ∂hausdorff n X, |f x| ≤ C) (hw : 0 ≤ w) (hwB : ∀ᵐ x ∂hausdorff n X, |w x| ≤ B) (T : ℝ) (hT : 0 < T) : letI : ProperSpace X := hX.proper K n hn …Mentions: OAI.RegularPointCoordinates.NoncollapsedRCD, OAI.RegularPointCoordinates.hausdorff