Mathematica Questions, Problems & Solutions : TransWikia.com ~ Page 11

Efficiently removing elements from list of permutations

I'm looking for an efficient way to remove entries from a list of permutations. I have a list of variables from which I calculate all possible permutations. I then want...

Asked on 10/22/2021

1 answer

Rendering realistically looking rope

I used this code of user Henrik Schumacher to try render a realistic looking rope. The result using ParametricPlot3D is here:...

Asked on 10/22/2021

0 answer

How to solve the differential equation

I need to solve the differential equation DSolve[{(1-x)y''[x]==1/5 [Sqrt](1+y'[x]^2),y[0]==0,y'[0]==0},y[x],x] but the result given seems to be incorrect and returns an error...

Asked on 10/22/2021

1 answer

Derivative of real antisymmetric matrix in mathematica

Is it possible to find the derivative of components of a real antisymmetric matrix using index notation? Eg: I have a very large real antisymmetric matrix. Then from Matrix Cookbook,...

Asked on 10/22/2021

1 answer

Why Does Parallelization Not Speed Up these Seemingly Well-Parallelizable, Simple Functions?

Original ExampleConsider function f, a parallelized version fPar, and a coarsest-grained parallelized version fParCG below.f[l_] := Map[Function[x, x[[#]] & /@ ConstantArray[Range[l], l]], Permutations[Range[l]]]fPar[l_] := ParallelMap[Function[x, x[[#]] &...

Asked on 10/22/2021

1 answer

What is it that breaks CreateUUID in Mathematica 10.4.1 and how can I fix it?

All of a sudden my Mathematica 10.4.1 installation which worked well for several years does behave very strange. For example when I evaluate:CreateUUID[]this either returns unevaluated or creates a...

Asked on 10/22/2021

1 answer

How to rewrite a tensor as a matrix

I put{TensorProduct[{1, 0}, {0, 1}, {0, 1}, {0, 1}, {0, 1}]}/Sqrt[2]//MatrixFormand I got$$left(begin{array}{cc} left(begin{array}{cc} left(begin{array}{cc} 0 & 0 \...

Asked on 10/22/2021

4 answer

Export output to a text file

I have the following output obtained after optimizing the positions of geometry using Minimizecommand{x[1] -> 1011.07, y[1] -> 1127.56, z[1] -> 420.922, x[2] -> 940.095, y[2] ->...

Asked on 10/22/2021

3 answer

Kernel starts up very slowly on Linux

V 12.1.1, starting a kernel, e.g. by entering wolframscript in the shell, takes an unexpectedly long time (~5 min, the time elapsed between pressing Enter and the showing-up of In[1]...

Asked on 10/22/2021

1 answer

How to send a graphic in a text message to a smartphone? (Likely using Twilio)

I have used SendMessage["MMS".... to send text with graphics to my mobile phone number given at $MobilePhone. But I would like to send MMS messages to other phones as well....

Asked on 10/22/2021

0 answer

Ask a Question

Get help from others!

Mathematica : Recent Questions and Answers (Page 11)

Ask a Question