spectral projector meaning in English

光谱投影仪
映谱仪

Then the following state - ments are equivalent : ( 1 ) 0 is an isolated point in ( 2 ) a is a finite rank operator ; is the spectral projector associated with . theorem4 . 5 let a be a compact normal operator , is an isolated point in prop4 . 13 let a be a compact normal operator , ao is an isolated point in a ( a )
定理乏止设a是紧正常算子，则下列条件等价：（）是o （ a ）的孤立卢、；仰a是有限秩算子； w 2n间a二一，其中灿1 ， …为” （用自所有的互不相同的孤立点，民： h ?马人一川为关于入的谱投影算子