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 Jun25 revised Showing that $\lim\limits_{n\to\infty}x_n$ exists, where $x_{n} = \sqrt{1 + \sqrt{2 + \sqrt{3 + …+\sqrt{n}}}}$ Added $-signs to show LaTeX. Jun25 suggested approved edit on Showing that$\lim\limits_{n\to\infty}x_n$exists, where$x_{n} = \sqrt{1 + \sqrt{2 + \sqrt{3 + …+\sqrt{n}}}}$Jun24 comment Interesting Math for 3-graders Yes, it is not exactly easy to see by youself - especially not when you're a 3rd-grader. But it is very easy to see that each of the yellow circles corresponds to precisely one way of choosing two purple circles! Telling them, without giving any insight in why it is so, that$\binom{n}{2}\$ describes the number of ways to choose two purple circles, would (should (could)) complete their understanding of this proof. Showing them, then, another simple geometric proof of this identity (does it have a name?) would really show the beauty of math; that the same thing can be said in many different ways Jun24 answered Interesting Math for 3-graders Jun23 comment Infinite divisibility of random variable vs. distribution Thank you very much! Should I delete my "question"? Jun23 comment Infinite divisibility of random variable vs. distribution Then there is none. This link says otherwise, which had me confused. Jun23 asked Infinite divisibility of random variable vs. distribution Dec19 awarded Nice Answer Nov22 comment Understanding Fourier Transform and FFT Thanks - I will take a look! Nov22 answered scale and ratio : try to find x,y,width,height Nov22 comment Understanding Fourier Transform and FFT That is exactly the situation, yes! Nov22 awarded Student Nov22 asked Understanding Fourier Transform and FFT May8 comment What are some examples of a mathematical result being counterintuitive? Well, it might not be directly related to fractal geometry, I guess. I heard of it in a fractal geometry course. The thing about it is, that it is possible to rotate the needle in a set of Lebesgue measure 0, but Hausdorff dimension 2. The latter takes fractal geometry to prove. May7 comment What are some examples of a mathematical result being counterintuitive? I heard about it in a Fractal Geometry-course. Funny result. In general, I think fractal geometry takes some getting used to. Fx the notion of Hausdorff-dimension. It is somewhat counterintuitive to me that a set, such as the Cantor Set can have irrational Hausdorff dimension (here ln 2/ ln 3), even if it is a subset of R, and has Lebesgue measure 0. May6 awarded Teacher May6 answered What are some examples of a mathematical result being counterintuitive?