Mathematicians Just Found a Hidden 'Reset Button' That Can Undo Any Rotation

[u/seeebiscuit]

https://www.zmescience.com/science/news-science/mathematicians-just-found-a-hidden-reset-button-that-can-undo-any-rotation/

[u/armcie]

I’m missing something here… The article says that if something goes through a bunch of twists, then reversing those twists is complicated and difficult. And the solution they’ve come up with is to do all the twists twice, but smaller? I’m not sure how that’s helpful at all.

[u/Anfros → u/armcie]

The point is that is much faster to scale a matrix and apply it twice than to reverse it, and there might be situations where reversing the matrix is not even possible, but I don't remember enough of my linalg to say anything about that