Talk:Robotics Kinematics and Dynamics/Description of Position and Orientation

I believe the "Compound Rotations" section is incorrect. Matrix multiplication is associative, so there is no distinction between multiplying the matrices first with each other and multiplying them sequentially on the vector to be rotated. Applying two rotation matrices does two sequential rotations, both about the original fixed axes. Or perhaps something else is meant by "premultiplying" and "postmultiplying" that the authors can clarify.

Material copied to Wikiversity Robotic Mechanics and Modeling
I am working on a robotics course on Wikiversity and have copied material to the following: https://en.wikiversity.org/wiki/Robotic_Mechanics_and_Modeling/Kinematics Admazzeo (discuss • contribs) 14:05, 4 February 2020 (UTC)