Let x e gl(n, F) nave n distinct eigenvalues a,,..., an in F. Prove that the eigenvalues of ad x are precisely the n² scalars a;-a; (1 < i, j s n), which of course need not be distinct.

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
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Let x e gl(n, F) nave n distinct eigenvalues a, ..., a, in F. Prove that
the eigenvalues of ad x are precisely the n2 scalars a;-a; (1 si,js n),
which of course need not be distinct.
Transcribed Image Text:Let x e gl(n, F) nave n distinct eigenvalues a, ..., a, in F. Prove that the eigenvalues of ad x are precisely the n2 scalars a;-a; (1 si,js n), which of course need not be distinct.
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