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广义瑞利商 Generalized Rayleigh Quotient
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$latex {R{ \left( {A,B,x} \right) }\text{ }=\text{ }\frac{{x\mathop{{}}\nolimits^{{H}}Ax}}{{x\mathop{{}}\nolimits^{{H}}Bx}}} $
其中 x 为非零向量,而 A,B 为 n×n 的 Hermitan 矩阵,B 则为正定矩阵,令 ,那么分母可以转化为:
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