1.3.1 Top new questions this week

1.3.1.1 Total flux of the gradient of the numerical solution of a PDE through a surface

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=246808

Trying to solve the following PDE with BC T==1 on a spherical cap of a unit sphere and T==0 at infinity (approximated as ...

asked by umby https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=58367 11 votes

answered by Tim Laska https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=61809 12 votes

1.3.1.2 What should I make of "Simplify: Time spent on a transformation exceeded \(-4.03955*10^{12}\) seconds"

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=247043

Running version "12.0.0 for Microsoft Windows (64-bit) (April 6, 2019)", in case that matters. I fed Mathematica the command ...

asked by A. Howells https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=80314 8 votes

answered by JimB https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=19758 4 votes

1.3.1.3 Barchart with statistics as labels

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=246820

The following code (thanks to @Jagra): ...

asked by Tugrul Temel https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=60365 7 votes

answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 8 votes

1.3.1.4 Challenge: Computing the Fourier Series of a List Plot!

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=247081

I have a bunch of data points (copied from Mathematica below), which I have ’ListPlotted’ I would now like to compute the Fourier series of this function (after doing a Fourier transform I assume? Or ...

asked by rdx https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=80329 6 votes

answered by Daniel Lichtblau https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=51 3 votes

1.3.1.5 How to solve this PDE for steady state?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=247031

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asked by psimeson https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=29312 6 votes

answered by Chris K https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=6358 8 votes

1.3.1.6 How to write that Lyapunov function?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=247073

For didactic purpose I investigate the stability of the ODEs system x'[t] == x[t] + y[t], y'[t] == -5 x[t] - 2 y[t]} Its stream plot ...

asked by user64494 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=7152 6 votes

answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 4 votes

1.3.1.7 How to rotate a circle around the y-axis and calculate the volume of the 3D solid?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=246948

How do I rotate the equation \({(x-5)^2}+{y^2}={3^2}\) around the y-axis and calculate the volume of the plotted 3D solid? I tried the code below but the result doesn’t work...

asked by AndreaNeg https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=80293 6 votes

answered by cvgmt https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72111 5 votes