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def definition def or abbrev

poisson_operator

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formal statement (Lean)

  19noncomputable def poisson_operator (P : KernelParams) (k a δρ : ℝ) : ℝ :=

proof body

Definition body.

  20  if k = 0 then 0 else -(4 * Real.pi * kernel P k a * δρ) / k^2
  21
  22/-- Predicate: Φ solves the modified Poisson equation for a given source δρ. -/

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