Math Problem Statement
这里的充分性是如何一步步化简得出的?
Solution
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Math Problem Analysis
Mathematical Concepts
Matrix Algebra
Positive Definiteness
Inverse Matrix
Formulas
x^T(AB + B^TA)x > 0
x^T AB x + (Bx)^T A x = 2(Ax)^T B x
Theorems
Positive Definite Matrix Definition
Properties of Matrix Transposition
Inverse Matrix Theorem
Suitable Grade Level
Undergraduate level (Linear Algebra)
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