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theorem proved term proof

midpointMap_fixed_point

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formal statement (Lean)

  43theorem midpointMap_fixed_point : midpointMap 1 = 1 := by

proof body

Term-mode proof.

  44  unfold midpointMap; norm_num
  45
  46/-- J decreases under the midpoint map for any x > 0, x ≠ 1. -/

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