Andrew Jaffe
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 Feb 4 awarded Yearling Feb 4 answered Limit involving DiracDelta gives zero Dec 11 awarded Yearling Nov 22 comment How can we multiply nested matrices? How do you have this stored? Aug 19 comment Mathematica not plotting whole logarithmic function But are you sure the real part is what you want?... Aug 6 comment Value for x such that |(x-y)| is minimum Do you perhaps mean to minimize the sum over the |x-y_i|? Aug 5 awarded Critic Aug 1 answered Plot of a function which includes numerical integrals Jul 18 answered How can I find all values of $m$ such that my cubic equation has three different positive solutions? Jul 18 comment How can I find all values of $m$ such that my cubic equation has three different positive solutions? Why are you taking the derivative of f[x]? Jun 26 answered Units, plotting and empty plots Jun 26 comment Units, plotting and empty plots Well, you've got at least one syntax error (but it doesn't solve the problem): you need {V,Quantity[0.06, "Liters"], Quantity[0.6, "Liters"]} as your plot limits, and you probably also don't want the curly braces around PVW call. Jun 14 comment Digital filter of image in Fourier space So why not just do what you suggest yourself? Multiply your fourier domain picture by something which highlights the modes you are interested in, since you know where they are in fourier space. May 16 comment Write a function that returns the logarithmic derivative Note that the expressions like func[f_]:=f'/f are not instructions about how to differentiate the particular function f that you've defined as "In:"! That is the definition for the pattern f_ which you just happen to have used the same letter for as your function. Apr 2 awarded Enlightened Apr 2 awarded Nice Answer Apr 2 awarded Commentator Feb 16 awarded Citizen Patrol Jan 24 comment Definite integral takes a very long time Cosmology! (It might actually be useful to allow z>=-1 so it's useful to the future as well as the past...) Jan 22 comment Simplification of double symbolic sums containing a DiscreteDelta without explicit summation range @Paco, use backticks for code!