Monthly Archives: February 2017

Taking square root of space rotation

Posted on 2017/02/25 by arkajad

While taking squares is easy, taking square roots may be dangerous. Taking square root of leads to imaginary numbers. Paul Dirac took square root of the Schrödinger equation, and he has created antimatter. Very dangerous. From Wikipedia: The reaction of … Continue reading →

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More recollections

Posted on 2017/02/24 by arkajad

The recollections in the last post were incomplete. So, here is the continuation. We have derived the property (1)   On the other hand we stressed the fact that given a unit vector : (2)   is the rotation matrix … Continue reading →

Posted in Attitude matrix, Quaternions, Spin and rotations, Stereographic projection | Leave a comment

Mathematics and sex

Posted on 2017/02/23 by arkajad

Nowadays mathematics is almost everywhere. To know some cool mathematics (or mathematician) is nowadays sexy. Therefore I am helping you here, on this blog, to have better relations in your lives. Just looking at the equations can already make you … Continue reading →

Posted in Attitude matrix, Euler's equations, Spin and rotations | 10 Comments