总体极小 meaning in English

global minimum

This paper mainly studies the backward perturbation methods in solving the linear systems , and total minimal backward perturbation ( tminback ) method for symmetric linear systems is presented
本文研究了求解线性方程组的向后扰动方法。对求解对称线性方程组的lanczos方法做出了向后扰动分析，给出了求解对称线性方程组的总体极小向后扰动( tminback )方法。
In order to reduce the computations and the memories , restarted version is used in it . by using the norm of the total backward perturbation as the termination of the algorithm , the new method makes up the shortcomings of using residual norm , and then the restarted total minimal backward perturbation ( rtminback ) method is proposed
为减少存储量，新算法采用重新开始的循环格式，并将总体向后扰动范数作为判断算法终止的准则，克服了残量范数作为终止准则的不足，得到了循环总体极小向后扰动( rtminback )方法。