半定的英文

例句与用法

1. Positive semi-definite matrices are positive definite if and only if they are nonsingular .
   正半定矩阵是正定的，当且仅当它们是非奇异矩阵。
2. Executing the lifting method to the equivalent programming , we present a strengthened semidefmite relaxation . as predicted by theory and confirmed by numerical experiments the tight semidefinite relaxation gives a better lower bound of circuit bisection than the one that the previous semidefinite relaxation gives
   本文先通过增加非线性约束得到原始问题的等价模型，进而对等价模型利用提升技术，提出了一个强化的半定松弛模型；最后，将结果推广到更具一般性的图的分割问题。