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 Apr 24 comment What is wrong with this simple FindRoot? Because you spelled Evaluate wrong? Apr 23 comment Formatting an equation: X^Y to pow(X,Y) There is always good ol' CForm. Apr 19 answered Efficient way to sum all the primes below $N$ million in Mathematica Apr 15 reviewed Approve Using GraphData to generate all directed graphs with n vertices Apr 15 reviewed Approve How do I plot a filled cylinder in 3D? Mar 16 comment Quantum Physics question It looks like the factor involving θ is a function that has equal positive and negatives bits, so it all integrates to zero. For example, h[0, 0, 1, 0] has a Cos[θ] Sin[θ] factor. Changing the range to {θ, 0, π/2} gives something more interesting, but I have no idea if that is a sensible thing to do for the problem. Mar 11 comment Weird results of calculating a sum of binomials? Put a GenerateConditions -> True in your sum and it will tell you when the answer is valid. Mar 11 comment Generating $\mathbb{Z}^*_n$ How about a Select over a simple range? Feb 22 comment Built in function to convert list of numbers into list of binary numbers There's BaseForm and IntegerDigits. Feb 18 comment Error with using SortBy in a Map You have an ampersand in the wrong place. You need SortBy[# , #[[2]] &]& Feb 12 answered Adjusting contrast of a color scale with ListDensityPlot Feb 11 comment Adjusting contrast of a color scale with ListDensityPlot Have you tried different colour schemes? Maybe "Rainbow" or "BrightBands". Have you tried a gamma correction instead of a log? Have you tried a ListContourPlot and specify the contours you want? Feb 11 comment Nested mapping of a function They are not the same if you define something for f. Try it with, say, f = #+1&. Feb 10 revised Where does this gray solid line come from in plot? typo Feb 10 comment Where does this gray solid line come from in plot? I have expanded my comment into an answer. I agree that it is a good question. The simple answer is just one of those things you remember with experience. Feb 10 answered Where does this gray solid line come from in plot? Feb 9 comment Where does this gray solid line come from in plot? Try Axes -> None Feb 7 awarded Yearling Dec 15 awarded Custodian Dec 15 reviewed Close Add a contour plot on the xy plane of a 3D plot