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  对偶单纯形法的迭代仍然是以为主元的旋转变换，但是它也有自己的特点。它是首先确定离开基的变量，即首先确定然后确定进入基的变量，即确定xk，一下就是求解单纯形法一例(Dual simplex method iteration is still the main element of the rotation transformation, but it also has its own characteristics. It is the first to leave the base to determine the variables, namely, first to identify and then determine the variables to enter the base, that is, to determine xk, what is the simplex method to solve a case)