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4-1Jacbi
- 对于阶数不高的方程组,直接法非常有效,对于阶数高,而系数矩阵稀疏的线性方程组却存在着困难,在这类矩阵中,非零元素较少,若用直接法求解,就要存贮大量零元素。为减少运算量、节约内存,使用迭代法更有利。-The order of the equations is not high, the direct method is very effective for high order, and the sparse coefficient matrix of linear equations, ther