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 Nov 9 comment Calculate periodicity in 1-dimensional array with noise Here's a tutorial on correlations in Mathematica. It's late here, so I don't have time to write up a complete answer. Nov 8 comment How to solve integral in Mathematica? @George, my apologies for not getting back to you sooner. I have a couple of questions. Why should $H$ be diagonal? I don't see any reason, a priori, why it should be. So, I'd check to see that c[n,m], h, and g are giving you what you expect. If not, let me know what you expect them to be, and we'll see if we can get them there. Nov 4 comment How to solve integral in Mathematica? @George, give me several hours to get back to this. I'll take a look at it then. Nov 4 comment How to solve integral in Mathematica? @George, looking at the terms in H for all $p=q$ between $5$ and $12$, they add identically to zero. For a lot of the other values of $p$ and $q$, all of the terms are identically equal to zero. Nov 4 answered How to solve integral in Mathematica? Nov 3 comment Determine $z^n+z^{-n}$ if $z+\frac{1}{z}=-2\cos{x}$ I'm assuming $x \in \mathbb{R}$? Nov 3 awarded Civic Duty Oct 29 comment Definite integral using the method of residues I believe you meant to have $\frac{1}{u^2}$ inside the middle integral in line 3? Oct 25 revised Example of a simple pole added align environment to bring formula within bounding box Oct 25 suggested approved edit on Example of a simple pole Oct 25 revised What is the math behind the game Spot It? added latex markup. Oct 25 suggested approved edit on What is the math behind the game Spot It? Oct 24 revised Evaluating the limit $y \to 0^+$ added latex to title Oct 24 suggested approved edit on Evaluating the limit $y \to 0^+$ Oct 14 revised Need some help settling a bet added latex markup Oct 14 suggested approved edit on Need some help settling a bet Oct 10 comment Fourier transform integral Have you tried spherical coordinates? Oct 10 comment An optimization problem involving orthogonal matrices @hardmath, you and Shiyu are both correct about my solution. For some reason, I though it could be moved like a matrix. Oct 9 revised Mathematica - How to solve for the equilibrium? added code and latex markup and adjusted spacing for clarity Oct 9 suggested approved edit on Mathematica - How to solve for the equilibrium?