半负定二次形式 [数] negative semidefinite quadratic form

半负定型 [数] negative semidefinite form ; negative semidefinite form

半负定的 negative semidefinite

半负定特盏问题 negative semidefinite eigenvalue problem

半负定矩阵 negative semi&finite matrix

非负半正定阵 positive semidefinite matrix

负半定矩阵 negative semidefinite matrix

负半定型 negative semidefinite form