Let F be the field of real numbers or the field of compl

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Theorem 5. Let F be the field of real numbers or the field of complex
numbers. Let A be an n X n matrix over F. The function g defined by
(9-4)
g(X, Y) = Y*AX
is a positive form on the space Fax1 if and only if there exists an invertible
n X n matrix P with entries in F such that A P*P.
Transcribed Image Text:Theorem 5. Let F be the field of real numbers or the field of complex numbers. Let A be an n X n matrix over F. The function g defined by (9-4) g(X, Y) = Y*AX is a positive form on the space Fax1 if and only if there exists an invertible n X n matrix P with entries in F such that A P*P.
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