mehdibgh

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6 years, 17 days

MaplePrimes Activity


These are questions asked by mehdibgh

restart:

``

K__vxa[1] := 2.0154553049*10^17

0.2015455305e18

(1)

`#mrow(mi("\`K__vxa\`"),mfenced(mn("1"),open = "[",close = "]"))`+K__vxa[1]

`#mrow(msub(mi("\`K"),mi("vxa\`")),mfenced(mn("1"),open = "[",close = "]"))`+0.2015455305e18

(2)

``

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I need to calculate the eigenvalues and eigenvectors of a big marix with enough Digits. When i apply the command Eigenvectors(K,M) for this purpose, it takes approximately 40 min to be calculated by maple. Where only 1/4 of cores of my CPU is used in this computation.

How is it possible to use all of my CPU cores to calculate the eigenvalues and eigenvectors of a big matrix faster?

change the txt to m for the following files.

K.txt

M.txt

How to find the eigenvalues and eigenvectors of a problem that have some zero diagonal elements which dont have the usual form of the standard eigenvalue problem? I have tested some ways, but the results was not accurate enough.
If it is possible please provide me an example with relatively large matrices (e.g. M>50)
Note that M>N.

I have a 3d matrix A(i.j.k), how is it possible to transpose it in maple to A(j,i,k)?

How is possible to plot two functions in one coordinate system but with different domains?

For example I want to see the both functions f1=x*exp(-x^2-y^2) and f2=exp(-x^2-y^2) in one coordinate system but with different domans as below:
f1: -3<x<3, -2<y<2

f2: -1<x<1, -1<y<2

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