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 Jul 22 comment Abstract Algebra book with exercise solutions recommendations. I really love Pinter's book, but the lack of solutions is really disappointing. Checking if you are right is such an important step in learning. May 29 comment intuition for the closed form of the fibonacci sequence Damn, well explained. May 29 comment intuition for the closed form of the fibonacci sequence @BrianM.Scott I think so. Let me work it out and see, thanks! May 29 comment intuition for the closed form of the fibonacci sequence Cool! Sounds like I'll understand this better by figuring out how to find closed form solutions for recurrences. "The sqrt(5) in the Binet formula ultimately comes from the initial conditions F0=0 and F1=1" could you elaborate more on this? May 29 comment intuition for the closed form of the fibonacci sequence Yes. Okay, so that clears up my first question. The next question: why divide by sqrt(5)? Feb 8 comment Calculating the “jaggedness” of a distribution Why would it be bigger for distribution #2? AFAIU, it would probably be smaller than #2 after normalizing, because #1 would be a vector like [.25 .25 .2 .3] and #2 would be something like [.1 .3 .1 .3].