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Is it possible to find or construct a RegionPlot out of KnotData? My motivation is to Texture the knots as per here. After much searching and playing around, I...
Asked on 03/02/2021
4 answerGiven an integer n, we can construct $2^n$ strings of length n. We can take the first element for each of these strings and create a list. In total...
Asked on 03/02/2021
1 answerConsider the following sample codepts = Table[{i, i^2}, {i, -10, 10}];foo = Interpolation[pts];Plot[InverseFunction[foo][y], {y, 0, 10}]From the plot, we see that InverseFunction[foo][y] only finds the positive x corresponding to...
Asked on 03/02/2021
2 answerA bug or limitation in 10.0.0 affects a few of these examples; it was resolved in 10.1.0. I am trying out Mathematica 10 on https://programming.wolframcloud.com. $PlotTheme interested me...
Asked on 03/02/2021 by Yi Wang
2 answerI was trying to reproduce a picture in a book by Havil of the sum, $$s = sum_{r=1}^{infty}frac{mu(r)}{r}left(Li(x^{rho_k/r})+Li(x^{rho_k*/r})right) $$ usings = Sum[(MoebiusMu[i]/i)*(LogIntegral[x^(ZetaZero[1]/i)] + ...
Asked on 03/02/2021
1 answerI use a High-Performance Cluster for some of my work. I can dynamically see the state of the work but I couldn't use the If statement in the cluster query....
Asked on 03/02/2021 by mrtydn
0 answerLooking for a methodology to choose line segments that are a rough fit to a given set of data. In this example, the data are {x,y} pairs. For...
Asked on 03/01/2021
3 answerI have been working on $$mathcal{L} psi =f$$ $$mathcal{L} f =0$$$$frac{partial{psi(r,theta)}}{partial r}|_{r=1}=0$$ $$frac{partial{psi(r,theta)}}{partial r}|_{r=3}=-frac{20(sin[theta])^{2}}{9}=mu(theta)$$ $$psi(r=1,theta)=0$$$$psi(r=3,theta)=frac{7}{3}(sin(theta))^{2}$$ where $$mathcal{L}u=triangledown.(triangledown u)-frac{2cot(theta)}{r^{2}}frac{partial u}{partial theta} -frac{2}{r}{frac{partial u}{partial r}}$$ such that u is...
Asked on 03/01/2021 by user49919
2 answerI want to detect directly when step size becomes "effectively" zero. The below example from the documentation throws the error message as expected:s = {};NDSolve[{(2 - f[x]) f'[x] ==...
Asked on 03/01/2021
1 answerI have written the following code. I have two main problems. The first is how to solve the matrix for different Omega, and the second is that if I put...
Asked on 03/01/2021 by Scott Constantine
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