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Mathematica : Recent Questions and Answers (Page 233)

Find answers to your questions about Mathematica or help others by answering their Mathematica questions.

Coordinate transformation on the Christoffel tensor Xcoba

I have to compute the Christoffel Symbols on a basis which is not the coordinate basis of the chart in mathematica.I should do this contraction:[CapitalGamma][-a, -b, c] =...

Asked on 10/17/2020 by ludovica crosato

0 answer

Eigenfunctions returned from NDEigensystem not in correct order

First I solved for the eigenfunctions and stored them as "funs": A = 0.05; Subscript[V, 0] = 1 ; d = 2; schröd = -A*d^2 [Pi]*D[[Psi][n,...

Asked on 10/16/2020 by Anthony

1 answer

Is there a reason why "Revolutions" and "Radians" or "AngularDegrees" are not CompatibleUnitQ?

I understand that keeping a consistent unit framework across multiple domains is complicated and not everyone will be satisfied with the choices made, like when people ask why "Radians" are...

Asked on 10/15/2020 by secavara

0 answer

Finding specific x value when y axis is zero

If I have the following data: https://pastebin.com/4F7R0nW0 Which plotted using ListLinePlot[data, PlotRange -> {{80, 110}, {-0.020, 0.05}}] gives: ...

Asked on 10/15/2020

0 answer

Fitting Experimental data knowing the possible fitting formula

Good Morning, I have a set of experimental data which i want to fit with a formula that I know it works. I tried to write a code in mathematica...

Asked on 10/14/2020 by Michaels

2 answer

How to use two separate colours for two lines in a single 'Plot' within the 'With' command?

'''With[{k = {1, 10}}, Plot[k*x^2, {x, 0, 1}]]'''I want to use two separate colours for two k values. How to do that? Thanks in advance....

Asked on 10/13/2020 by Chowdhury Aminul Islam

1 answer

Neural Network for polynomial fit

I'm trying to build up a neural network with Mathematica 11.0, that should fit data which behaves like a polynom of third order.I thought that an NN with one...

Asked on 10/12/2020 by A.Zachl

4 answer

Remove existing ServiceConnect authentication credentials

I am working on a project using the BingSearch ServiceConnect (ServiceConnect["BingSearch"])and I would like to use a different authentication key then what I initially provided (which was asked when...

Asked on 10/11/2020 by MathematicaUser

0 answer

AsymptoticSolve and Series not working in limit $to infty$. How to solve this functional polynomial relationship?

I want to solve for $J_d$ as a function of $n_d$ for $etagg1$ and $etaggeta_0$ in the following equations by eliminating $eta$ from the two...

Asked on 10/10/2020 by Indeterminate

0 answer

How to define the judgment function of extremum points

I encountered a problem in solving the math problem in China's 2019 postgraduate entrance examination. I need...

Asked on 10/09/2020

1 answer

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