上对于稀疏矩阵的定义是这样的：“非零元较零元少（注：原书下文给出了大致的程度），且分布没有一定规律”，照这个说法，那题的答案应该是不一定是稀疏矩阵，因为可能是特殊矩阵-on for sparse matrix is defined like this : "nonzero billion yuan less than zero (Note : The original book is generally below the level), the distribution of certain laws not," as the saying that the answer to that is not necessarily sparse matrix, which may be a unique matrix