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theorem proved term proof

xiMap_mul_reflection

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formal statement (Lean)

 133theorem xiMap_mul_reflection (σ : ℝ) : xiMap σ * xiMap (1 - σ) = 1 := by

proof body

Term-mode proof.

 134  rw [xiMap_reflection]
 135  exact mul_inv_cancel₀ (xiMap_ne_zero σ)
 136
 137/-- The quotient of defect coordinates for reflected points squares. -/

depends on (10)

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