xH Ax).

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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4.10. (a) Prove that all the eigenvalues of a com-
plex Hermitian matrix A are real (Hint: Consider
xH Ax).
Н
(b) Prove that all the eigenvalues of a real sym-
metric matrix A are real.
4.11. Give an example of a symmetric complex
matrix (not Hermitian) that has complex eigen-
values (i.e., with nonzero imaginary parts).
Transcribed Image Text:4.10. (a) Prove that all the eigenvalues of a com- plex Hermitian matrix A are real (Hint: Consider xH Ax). Н (b) Prove that all the eigenvalues of a real sym- metric matrix A are real. 4.11. Give an example of a symmetric complex matrix (not Hermitian) that has complex eigen- values (i.e., with nonzero imaginary parts).
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