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Ben_Jones comments on Joint Configurations - Less Wrong
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Comments (36)
Opposite problem - I know pretty much what an imaginary number is, and even some applications of i. Numbers can have real and imaginary elements, fine. But I have no idea why they have an application here.
That said, this post makes a lot of intuitive sense to me, a humanities graduate, so this series is off to a pretty good start. If Eliezer's good at one thing, it's explaining complex-seeming things I know a little about in a very sensible and useful way.
Actually, I was in exactly the same position.
Then I actually read the article from the comment above (to refamiliarise myself with the maths), and was quite surprised to find that the article makes this relation very clear.
Worth a look. :)
Oh my god...imaginary numbers...they make sense now! Seriously, thank you for that link. I've gotten all the way through high school calculus without ever having imaginary numbers=rotation explained. Looking at the graph for 10 seconds completely explained that concept and why Eliezer was using imaginary numbers to represent when the photons were deflected.