... 对称多面体 symmetric polyhedrons 正对称系 symmetric positive system 对称二次形式；对称二次型 symmetric quadratic form ...
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This paper is investigated a preconditioned conjugate gradient method in solving a linear algebraic system of large sparse symmetric and positive equations.
本文研究了解决大型稀疏对称正定线性方程组的一类预条件共轭梯度法。
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。
At the same time, a new proof is given for the sufficient and necessary condition of the SOR method applied to symmetric and positive definite system.
进一步丰富了SOR理论，同时给出了SOR方法在对称正定条件下收敛的充要条件的又一新证明。
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