Unlike the quaternions, it is non-associative.
zettelkasten.de/posts/overview/ mentions one page to rule them all:
How many Zettelkästen should I have? The answer is, most likely, only one for the duration of your life. But there are exceptions to this rule.
Specifies the derivative in a direction normal to the boundary.
Can be used for elliptic partial differential equations and parabolic partial differential equations.
Bibliography:
CosmicPI: Detecting Cosmic Rays with a Raspberry Pi by Marco Reps (2021)
Source. National Institute of Standards and Technology by 
Ciro Santilli 35 Updated 2025-01-10 +Created 1970-01-01
Ciro Santilli 35 Updated 2025-01-10 +Created 1970-01-01These people are serious.
Looks cool! Ciro Santilli loves simulations!
TRI means Toyota Research Institute BTW.
The Robotics team at TRI is working hard to close the gap between simulation and reality. For manipulation, one important piece is accurate simulation of rigid-body contact.
Ciro Santilli does not believe in free will of course because he is an agnostic and he believes that brains are controlled by the laws of physics, see also: physics and the illusion of life.
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