First we consider the spectral properties of the operator corresponding to this system and obtain that all points on the imaginary axis except for zero belong to resolvent set of the operator , zero is an eigenvalue of the operator and its adjoint operator with geometric multiplicity one 先討論了對應于該系統的主算子的譜特征并且得到了在虛軸上除了0點外其它所有點都屬于該主算子的豫解集, 0是該主算子及其共軛算子幾何重數為1的特征值。
百科解釋
In linear algebra and operator theory, the resolvent set of a linear operator is a set of complex numbers for which the operator is in some sense "well-behaved". The resolvent set plays an important role in the resolvent formalism.