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def definition def or abbrev

circularVelocity

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formal statement (Lean)

  52noncomputable def circularVelocity (M r : ℝ) (hr : r > 0) : ℝ :=

proof body

Definition body.

  53  Real.sqrt (G * M / r)
  54
  55/-- For a point mass (or spherical distribution):
  56    v(r) ∝ 1/√r (Keplerian falloff)
  57
  58    But observed: v(r) ≈ constant! -/

depends on (9)

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