稀疏矩阵库，包括加法，乘法，解线性系统，比较标准，速度很快，但在window下编译时，可能会碰上一点小麻烦，需要自己手工稍加改动。其中包括另一个库mv++。-Sparse matrix libraries, including the addition, multiplication, solving linear systems, the standard for comparison, very fast, but in the window under the compile time,