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。
2
A new block cipher is designed where the diffusion of matrix multiplication is combined with the confusion of specially designed matrix operation to encrypt information.
By using the methods of table lookups, probability quantization and modified renormalization operations, a simple multiplication-free binary block arithmetic coding scheme is given.