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def definition def or abbrev

df2_dm_ratio

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formal statement (Lean)

  72noncomputable def df2_dm_ratio : ℝ := 1.5

proof body

Definition body.

  73
  74/-- Typical UDG surface brightness (mag/arcsec²).
  75    Value: μ_V > 24 -/

used by (4)

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