3) 矩阵与向量相乘(Matrix Vector Multiplication) 4) 矩阵与矩阵相乘(Matrix Matrix Multiplication) 5)矩阵乘法性质(Matrix Multiplication Properties) ..
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And we can reformulate this in terms of matrix multiplication or matrix product.
我们可以用，矩阵乘法或矩阵乘积的形式来表述这些式子。
From this point of view, we can concisely and intuitively introduce the multiplication principles of elementary matrix and block matrix.
用变量的线性替换解释矩阵乘法，由此可以简洁而且直观地导出初等矩阵和分块矩阵的乘法原理。
If we use the equation of least square estimator directly, computing amount is often very great because course of computing need calculate the inverse of matrix and multiplication of matrix.
若直接采用最小二乘估计的公式，因计算过程需要求矩阵的逆及乘积，计算量非常大。
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