矩阵常用概念及运算法则

$$ (\mathbf{A}+\mathbf{B})^{\top} = \mathbf{A}^\top + \mathbf{B}^\top $$ $$ \lambda \mathbf{A}^{\top} = \lambda \mathbf{A}^\top $$ $$ (\mathbf{A} \mathbf{B})^{\top} = \mathbf{B}^\top \mathbf{A}^\top $$

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