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phi-Self-Approaching Curves

We consider all planar oriented curves that have the following property. For each point B on the curve, the rest of the curve lies inside a wedge of angle φ with apex in B; here φ < π is fixed. This property restrains the curve's meandering. We provide an upper bound for the length of such a curve, divided…
Hagen: FernUniversität in Hagen, 1997