To the inverse problem of the system of linear algebraic equations, tiauthor gives a symmetric matrix solution and the expression of its general solution.

本文给出线性代数方程组反问题的对称矩阵解，及其通解表达式。

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After solving the system of linear algebraic equations, another problem is induced that requires revising this coefficient matrix in order to get a new system of equations.

在线性代数方程组已解出之后，另一个课题需要修改它的系数矩阵，从而得到一个新的方程组。

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The method ICCG. is one of the best iterative method for solving the system of linear algebraic equations, but it can only be applied to the symmetric and positive definite coefficient matrix.

IC CG方法是解线性代数方程组较为理想的方法，但它仅适用于具有正定对称的系数阵。

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