Abstract
Chasles’ theorem, a classic and important result of kinematics, states that every orientation-preserving isometry of \({\mathbb{R}^3}\) is a screw motion. We show that this is equivalent to the assertion that each proper Euclidean motion that is not a pure translation, acting on the space of oriented lines, has a unique fixed point (the axis of the screw motion). We use that formulation to derive a simple and novel constructive proof of Chasles’ theorem.
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Palais, B., Palais, R. Chasles’ fixed point theorem for Euclidean motions. J. Fixed Point Theory Appl. 12, 27–34 (2012). https://doi.org/10.1007/s11784-012-0077-0
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DOI: https://doi.org/10.1007/s11784-012-0077-0