Prove that the eigenvalues of an upper (or lower) triangular matrix are just the diagonal elements of the matrix.
Prove that the eigenvalues of an upper (or lower) triangular matrix are just the diagonal elements of the matrix.
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter4: Eigenvalues And Eigenvectors
Section4.3: Eigenvalues And Eigenvectors Of N X N Matrices
Problem 31EQ
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Prove that the eigenvalues of an upper (or lower) triangular matrix are just the diagonal elements of the matrix.
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Step 1
Let the upper triangular matrix be A and the lower triangular matrix be B.
To show that: The eigenvalues of an upper (or lower) triangular matrix are the diagonal elements of the matrix.
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