Mathematica Questions, Problems & Solutions : TransWikia.com ~ Page 55

Bilinearization with Mathematica - where to start?

I tried to bilinearize the two equations:eq = {Laplacian[psi[t, x, y], {x, y}] + 6 u[t, x, y] psi[t, x, y] + (x^2 +...

Asked on 07/16/2021 by vqngs

4 answer

Skip time taking loop values to take input next value after certain time

I am fitting using NonlinearModelFit, where I am trying to input guess values for parameters (g and xp1) from the for a loop. For a certain value of g or...

Asked on 07/16/2021 by Dhruv Sharma

1 answer

How to generate isotropic tensors?

Consider a real tensor $bf{T}$ upon $mathopotimeslimits_{n}(mathbb{R}^3)$, with a definite order $n$, it could be isotropic, i.e., be invariant under the action of all elements in ...

Asked on 07/16/2021 by Chromo Runge

1 answer

NDSolve::ndsz: step size is effectively zero; singularity or stiff system suspected + other warnings for system of differential equations

I'm trying to solve a set of differential equations numerically to get a 3D plot, but I am getting multiple different warnings and errors. First of all, here is the...

Asked on 07/16/2021

1 answer

Plotlabel too high issue (V12.3)

I think I started to notice this issue with plots when I updated to version 12.3 a couple weeks ago but didn't pay too much attention. Now it's really bugging...

Asked on 07/16/2021

1 answer

Combining two plots with different x-axes and not labeling the x-axis

Below two figures are just for example. What should I do if I want to plot the two figures below on the same plot with the same y-axis only that...

Asked on 07/15/2021

2 answer

Plotting points of matrix

I have a matrix with 'n' rows and 3 columns where the first two columns are the X and Y values and the third column is f(x,y). All values are...

Asked on 07/15/2021 by SRoy_00

2 answer

Why can't the union of these regions be displayed completely?

Let $Omega$ be a spatial region bounded by cone $z=sqrt{x^{2}+y^{2}}$ and hemispherical surface $z=sqrt{R^{2}-x^{2}-y^{2}}$, and $Sigma$ be the outer side of the entire boundary of the...

Asked on 07/15/2021

0 answer

Mixture of density functions

Can Mathematica select the appropriate number of terms when fitting a density function with a mixture of density functions? If so, can it also select the most suitable distributions involved...

Asked on 07/15/2021 by Kief

0 answer

How to throw $n$ random noodles of equal length?

I've been meaning to modify some code given in the the Region Disjoint documentation for the Buffon's Needle problem to instead model ...

Asked on 07/15/2021 by Bhoris Dhanjal

2 answer

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