under certain condition it is proved that all the complex eigenvalues of this operator, except at most finitely many ones, are of algebraic multiplicity 1.
在一定的条件下证明了,除至多有限个外,人口算子复本征值的代数重数均为1 。
at last we give an algorithm to characterize the algebraic multiplicity of the ifm in terms of only the system matrices of single input singular systems.