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theorem proved term proof

gamma_fixed_point

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formal statement (Lean)

  46theorem gamma_fixed_point :
  47    (gamma - 1) * (gamma - 2) = 2 := by

proof body

Term-mode proof.

  48  unfold gamma; ring
  49
  50/-- `γ = 3` is the unique positive solution of `(γ - 1)(γ - 2) = 2`
  51with `γ > 2`. The other solution is `γ = 0`, which is non-physical. -/

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depends on (12)

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