病态线性方程组的一些求解算法，包括传统的CG，CGLS，CGNR，LSQR和较新的OVM算法，它们都是一些迭代算法。(Some solving algorithms for ill conditioned linear equations include conventional CG, CGLS, CGNR, LSQR, and newer OVM algorithms, all of which are iterative algorithms.)