structure
definition
def or abbrev
SelfSimilarity
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formal statement (Lean)
108structure SelfSimilarity (X : Type*) where
109 /-- The scaling factor. -/
110 factor : ℝ
111 /-- Positive factor. -/
112 factor_pos : 0 < factor
113 /-- The scaling map. -/
114 scale : X → X
115
116/-- The golden ratio φ = (1 + √5) / 2. -/