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 2d comment Geometric brownian motion - Ito's lemma They should be corrected now. 2d revised Geometric brownian motion - Ito's lemma Corrected all the errors 2d comment Geometric brownian motion - Ito's lemma @Ian you are absolutely correct. There are just so many errors. Haha. Sorry for that. 2d answered Geometric brownian motion - Ito's lemma Apr12 answered Finding the probability of loss from standard deviation in normal distribution Mar28 awarded Yearling Sep24 awarded Autobiographer Aug16 awarded Commentator Aug16 comment How to measure power spectral density in matlab? Thanks, both of you. I have added the Signal Processing-tag. If I use the above code, what should then be the unit of the x-axis? Note that this question is actually an exact duplicate of this question, which I have posted to get the most peoples attention. If you have any comments, here or there, please let me now. Aug16 revised How to measure power spectral density in matlab? edited tags Aug15 asked How to measure power spectral density in matlab? Aug14 comment Non integral degree derivatives I'm afraid not. But you might want to add that to your question. I just remembered seeing this a while ago, so it was quite easy for me to search for right now. But I have no experience with it whatsoever.:( Aug14 answered Non integral degree derivatives Aug8 answered Obtain a grammar for the language (i) L = {a ^m b ^n ; m ≠ n ; m , n > 0 } Aug8 awarded Supporter Jun27 comment Is there any mathematical theory behind sudoku? I know this is probably not what you're looking for, but check out this article describing the connection between the solution of sudokus and CAT scans, via the Radon Transform. In my opinion, that is really quite incredible! Jun25 awarded Editor 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