Finding Eigenvectors and Values of Non-Hermitian Matrices with Mathematica

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Mathematica can find eigenvectors and eigenvalues for non-Hermitian matrices using the Eigensystem function, but users have reported inconsistencies in results. The discussion highlights challenges in applying the Householder transformation to convert a non-Hermitian matrix into an upper triangular form, with little progress after multiple applications. There is a call for guidance on effectively finding eigenvalues and eigenvectors for non-Hermitian matrices, as existing resources often lack detailed examples. The user expresses uncertainty about Mathematica's capability to handle non-Hermitian matrices accurately. Recommendations include consulting specific literature for deeper insights into the algebraic eigenvalue problem.
physicsjock
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Hey,

I have two quick questions,

Does mathematica automatically find the eigenvectors and values when you find the eigensystem of a non-Hermitian matrix?

I've been searching the net trying to find a way to find these vectors/values but everything I find briefly touches upon non-Hermitian without actually doing anything.

The method I have been trying is to apply the householder transformation and turn the matrix into a upper triangular hessian matrix, but after 10 applications of the householder transformation my matrix doesn't show any signs of change.

Could anyone point me in the right direction in finding the eigevectors and values of a non-Hermitian matrix?

Also if anyone knows if mathematica actually does properly determine these quantities of non-Hermitian matrix automatically when running eigensystem please let me know.

This line of code is the only part I'm not sure about, I have a feeling that mathematica doesn't determine the eigensystem of non-Hermitians properly.


Thanks in advanced
 
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I've never actually seen an example of this before,

Try "They algebraic eigenvalue problem" by J.H.Wilkinson
 
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

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