Not only collision detection, but everything that uses floats like graphic does. I would recommend introductions to numerics and linear algebra, which should cover everything needed (the theory and how to actually use floats in programs) but not be overly "mathematical" formulated. But as I am a mathematician (who learned that 25 years ago) I don't háve any concrete recommendations of books or videos of lectures and you would not be able to read my handwriting, as I would have problems reading what I wrote back then ;).

I ask this because I speculate that I discovered "new math". It is unlikely, because I failed math in school, but I dared to imagine 0=1 like many others. But the complete line of math I am trying to prove is -1=1=0=∞. It does sound crazy, I know. But I honestly think this line of math is what separates us from actual, working fusion. Of course, I realize how insane I sound, and that is why I am looking for ways to probe my hypothesis. I think I am getting closer, but literally every single person I talked to about this told me I should visit a psychiatrist :')