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Abstract The conformal nature of smooth curves in R 3 is characterised by conformal length, curvature and torsion. We present a derivation of these conformal parameters via a limiting process using inscribed polygons with circular edges. The procedure is based on elementary geometry in R 3 only and similar to the rectification of curves in the metrical case. It seems to be not available in the literature so far.
Harald Dorn (Mon,) studied this question.