矩阵常用概念及运算法则

(A+B)=A+B (\mathbf{A}+\mathbf{B})^{\top} = \mathbf{A}^\top + \mathbf{B}^\top λA=λA \lambda \mathbf{A}^{\top} = \lambda \mathbf{A}^\top (AB)=BA (\mathbf{A} \mathbf{B})^{\top} = \mathbf{B}^\top \mathbf{A}^\top

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