OAI/Geometry/RCD/Heat/GaussianLinearGrowth.lean
3 declarations, 0 contain sorry, 0 declared as axioms
Global exponential volume growth is absorbed by Gaussian decay
- theorem
OAI.RegularPointCoordinates.linear_sub_quadratic_leline 15Source documentation
Completing the square leaves half of the Gaussian exponent available.
theorem linear_sub_quadratic_le (A s : ℝ) {c : ℝ} (hc : 0 < c) : A * s - c * s ^ 2 ≤ A ^ 2 / (2 * c) - (c / 2) * s ^ 2 := by … - theorem
OAI.RegularPointCoordinates.summable_gaussian_with_linear_growthline 25Source documentation
A fixed exponential volume factor in the shell radius does not spoil summability of any geometric normalization loss.
theorem summable_gaussian_with_linear_growth {b c : ℝ} (hb : 0 ≤ b) (hc : 0 < c) (A : ℝ) : Summable (fun j : ℕ => b ^ j * Real.exp (A * 2 ^ j - c * 4 ^ j)) := by … - theorem
OAI.RegularPointCoordinates.summable_shell_with_linear_growthline 45Source documentation
The first shell includes the pole; all later shells still allow a global hyperbolic exponential factor in their radius.
theorem summable_shell_with_linear_growth {b c : ℝ} (hb : 0 ≤ b) (hc : 0 < c) (A : ℝ) : Summable (fun j : ℕ => b ^ j * Real.exp (A * 2 ^ j) * gaussianShellFactor c j) := by …