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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 answerI 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 answerI 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 answerIs 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 answerOriginal 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 answerAll 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 answerI 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 answerI 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 answerV 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 answerI 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
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