`BookProof.ChapterSphericalBesselODE.contDiffOn_sbesselBase` : ContDiffOn ℝ (⊤ : ℕ∞) sbesselBase {r : ℝ

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`BookProof.ChapterSphericalBesselODE.contDiffOn_sbesselBase` : ContDiffOn ℝ (⊤ : ℕ∞) sbesselBase {r : ℝ | r ≠ 0} · Prove2Me