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Question: How do I calculate all eigenvalues of a large symbolic matrix?

Question:How do I calculate all eigenvalues of a large symbolic matrix?

MapleEnthusiast 60 Maple
May 17 2021
1

Dear Maple community, 
I've been trying to calculate all eigenvalues of a (large) symbolic matrix M (see EigenvaluesQ.mw) using:

with(LinearAlgebra):
LinearAlgebra:-Eigenvalues(M):

or simply 

Eigenvalues(M)

but, unfortunately, my computer (64Gb RAM, Maple 2020) doesn't deliver a solution after 1 hour of computation. Am I doing something wrong? Thank you very much in advance!
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