`BookProof.ChapterSolidHarmonic.solidHarmonicIm_euler` (u v e : E) {l μ : ℕ} (hμ : μ ≤ l) (x : E) : fderiv ℝ (solidHarmonicIm u v e l μ) x x = (l : ℝ) * solidHarmonicIm u v e l μ x

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`BookProof.ChapterSolidHarmonic.solidHarmonicIm_euler` (u v e : E) {l μ : ℕ} (hμ : μ ≤ l) (x : E) : fderiv ℝ (solidHarmonicIm u v e l μ) x x = (l : ℝ) * solidHarmonicIm u v e l μ x · Prove2Me