非负定阵
nonnegative definite matrices
双对称非负定阵
bisymmetric nonnegative definite matrix
bisymmetric nonnegative definite matrices
半正定阵
positive semi-definite matrix
Symmetric positive
复亚半正定阵
complex semi-positive subdefinite matrix
半正非线性
semipositone nonlinearity
半正非线性性
semipositone nonlinearity
非Hermitian正定矩阵
non-Hermitian positive definite matrix
非负(正)矩阵
nonnegative(positive) matrices
非负定矩阵
non-negative definite matrix
非负非平凡解
nonnegative nontrivial solution
非正定自伴算子
non-positive definite self-adjoint operator
半负定二次形式
negative semidefinite quadratic form
半负定二次型
negative semidefinite quadratic form