短語詞組短語negative definite hermitian quadratic form 負(fù)定埃爾米特二次型non -negative definite quadratic form 非負(fù)二次型semi -negative definite quadratic form 半負(fù)定二次型negative semi -definite hermitian quadratic form 半負(fù)定埃爾米特二次型 返回 negative definite quadratic form