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theorem proved term proof

planetStratumCount

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formal statement (Lean)

  43theorem planetStratumCount : Fintype.card PlanetStratum = 15 := by

proof body

Term-mode proof.

  44  simp only [PlanetStratum, Fintype.card_sum, atmoCount, earthCount, oceanCount]
  45
  46/-- The three injections are not surjective: each covers only 5 of 15. -/

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depends on (9)

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