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def definition def or abbrev

PhiLadder

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formal statement (Lean)

  83def PhiLadder : Set ℝ := { x | ∃ n : ℤ, x = φ^n }

proof body

Definition body.

  84
  85/-- φ^n is always positive for any integer n -/

used by (26)

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depends on (6)

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