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Mathematica : Recent Questions and Answers (Page 24)

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

Cannot open Utilities 'FilterOptions'

I'm trying to run a code like this in Mathematica:(* initialize everything *)ClearAll["Global`*"]Remove["Global`*"](* all *nb are in $WorkingDirectory *)$WorkingDirectory = "/Users/U1/Workspace/BCOASMBH/Core/Fortran/"(* Load Assumptions and format.m *)Get[FileNameJoin[{$WorkingDirectory, "TemplateForHamiltonian.nb"}]];However, I...

Asked on 08/31/2021

0 answer

Avoiding CopyTensor of large array in Compiled functions

After reading about how to avoid the CopyTensor in various cases I still do not understand the optimal answer for the Fast-Hadamard transform below (CopyTensor appears in line 4 of...

Asked on 08/31/2021 by Alexis Michailidis

1 answer

Integrodifferential equation solving

I am trying to solve a integrodifferential equation in Mathematica, i.e., I'm trying to find a way to evaluate the code below, which isn't yet supported in mathematica, as far...

Asked on 08/31/2021

0 answer

4X4 matrix of distinct cubed integers with identical row and column sums

I wrote the following code:ClearAll[findMat]findMat = Module[{csums = ConstantArray[#, 4], mats = Select[DuplicateFreeQ[Join @@ #] &]@ ...

Asked on 08/30/2021

2 answer

Why doesn't this function TransformedDistribution work?

According to the information in this post, we know that ${displaystyle z={sqrt {-2ln U_{1}}}cos(2pi U_{2})}$ follows a normal distribution, and the datas generated supports this view....

Asked on 08/30/2021

1 answer

Need to verify strange behavior with Product[]

I'm running 12.1.0.0 on MacOS X x86 (64-bit). The expressionProduct[1 - 1/n^5, {n, 2, Infinity}]yields 0 as output, which is clearly false. Wolfram Alpha...

Asked on 08/30/2021 by heropup

1 answer

NIntegrate timing discrepancy

When I run the following identical numerical integralsNIntegrate[ Exp[2 I s] Exp[2 I t] ((Cos[s] - Cos[t])^2 + (Sin[s] - Sin[t])^2) + 1, {s, 0,...

Asked on 08/30/2021

2 answer

How to solve the wave velocity in steel

In the simulation of stress wave propagation, I have the following two problems. First question: This question comes from page 69 of this book. The Lame equation for...

Asked on 08/30/2021

1 answer

Obscure explanation on Adaptive scheme of NIntegrate

I found the documentation of wolfram appears to be written hurriedly since it seems to contain a number of unclear statements, e.g., equation numbers were often missed, texts in codes...

Asked on 08/30/2021

0 answer

The intersection point of a line crossing a surface is not displayed correctly In 3D Graphics

This is my code:Show[{ParametricPlot3D[{x, y, 0}, {x, -4, 4}, {y, -4, 4}, PlotStyle -> LightGray, Mesh -> None], ParametricPlot3D[{0, 0, t}, {t, -8, 8},...

Asked on 08/29/2021

2 answer

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