Let A be a n xn matrix. Show that det(A) is the product of all eigenvalues of A. Suppose that A is diagonalizable. Show that tr(A) is the sum of all eigenvalues of Set n = 2. Suppose that A is diagonalizable, and A has only nonnegative eigenval- v that tr(A) > det(A)÷. ) is true for non-diagonalizable square matrices as well. ) is true for all n > 0.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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4. [correctness,
Let A be a n xn matrix.
(1)
Show that det(A) is the product of all eigenvalues of A.
(2)
Suppose that A is diagonalizable. Show that tr(A) is the sum of all eigenvalues of
А.
(3)
ues. Show that
Set n = 2. Suppose that A is diagonalizable, and A has only nonnegative eigenval-
tr(A)
2 det(A).
Remark. (2) is true for non-diagonalizable square matrices as well.
Remark. (3) is true for all n > 0.
Transcribed Image Text:4. [correctness, Let A be a n xn matrix. (1) Show that det(A) is the product of all eigenvalues of A. (2) Suppose that A is diagonalizable. Show that tr(A) is the sum of all eigenvalues of А. (3) ues. Show that Set n = 2. Suppose that A is diagonalizable, and A has only nonnegative eigenval- tr(A) 2 det(A). Remark. (2) is true for non-diagonalizable square matrices as well. Remark. (3) is true for all n > 0.
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