# Pedal coordinates and free double linkage

@article{Blaschke2021PedalCA, title={Pedal coordinates and free double linkage}, author={Petr Blaschke and Filip Blaschke and Martin Blaschke}, journal={Journal of Geometry and Physics}, year={2021} }

Using the technique of pedal coordinates we investigate the orbits of a free double linkage. We provide a geometrical construction for them and also show a surprising connection between this mechanical system and orbits around a Black Hole and solutions of Dark Kepler problem.

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