Open Access
2012 Vector Decompositions of Rotations
Danail Brezov, Clementina Mladenova, Ivaïlo Mladenov
J. Geom. Symmetry Phys. 28: 67-103 (2012). DOI: 10.7546/jgsp-28-2012-67-103


Here we derive analytic expressions for the scalar parameters which appear in the generalized Euler decomposition of the rotational matrices in $\mathbb{R}^3$. The axes of rotations in the decomposition are almost arbitrary and they need only to obey a simple condition to guarantee that the problem is well posed. A special attention is given to the case when the rotation is decomposable using only two rotations and for this case quite elegant expressions for the parameters were derived. In certain cases one encounters infinite parameters due to the rotations by an angle $\pi$ (the so called half turns). We utilize both geometric and algebraic methods to obtain those conditions that can be used to predict and deal with various configurations of that kind and then, applying l'Hôpital's rule, we easily obtain the solutions in terms of linear fractional functions. The results are summarized in two Tables and a flowchart presenting in full details the procedure.


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Danail Brezov. Clementina Mladenova. Ivaïlo Mladenov. "Vector Decompositions of Rotations." J. Geom. Symmetry Phys. 28 67 - 103, 2012.


Published: 2012
First available in Project Euclid: 26 May 2017

zbMATH: 1291.15070
MathSciNet: MR3114816
Digital Object Identifier: 10.7546/jgsp-28-2012-67-103

Rights: Copyright © 2012 Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences

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