torbonde
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 Sep 24 awarded Autobiographer Aug 16 awarded Commentator Aug 16 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. Aug 16 revised How to measure power spectral density in matlab? edited tags Aug 15 asked How to measure power spectral density in matlab? Aug 14 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.:( Aug 14 answered Non integral degree derivatives Aug 8 answered Obtain a grammar for the language (i) L = {a ^m b ^n ; m ≠ n ; m , n > 0 } Aug 8 awarded Supporter Jun 27 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! Jun 25 awarded Editor Jun 25 revised Showing that $\lim\limits_{n\to\infty}x_n$ exists, where $x_{n} = \sqrt{1 + \sqrt{2 + \sqrt{3 + …+\sqrt{n}}}}$ Added $-signs to show LaTeX. Jun 25 suggested approved edit on Showing that$\lim\limits_{n\to\infty}x_n$exists, where$x_{n} = \sqrt{1 + \sqrt{2 + \sqrt{3 + …+\sqrt{n}}}}$Jun 24 comment Interesting Math for 3-graders Yes, it is not exactly easy to see by youself - especially not when you're a 3rd-grader. But it is very easy to see that each of the yellow circles corresponds to precisely one way of choosing two purple circles! Telling them, without giving any insight in why it is so, that$\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 Jun 24 answered Interesting Math for 3-graders Jun 23 comment Infinite divisibility of random variable vs. distribution Thank you very much! Should I delete my "question"? Jun 23 comment Infinite divisibility of random variable vs. distribution Then there is none. This link says otherwise, which had me confused. Jun 23 asked Infinite divisibility of random variable vs. distribution Dec 19 awarded Nice Answer Nov 22 comment Understanding Fourier Transform and FFT Thanks - I will take a look!