On the structure of polynomially compact operators
If \(T\) is a polynomially compact operator on a separable Hilbert space then \(T\) is decomposed into the finite direct sum \[ T= \bigoplus^n_{i=1} (N_i+ K_i+\lambda_i I), \] where \(N_i\) are nilpotents, the \(K_i\) are compact, and the set \(\{\lambda_1,\dots, \lambda_n\}\) is the Weyl spectrum of \(T\).
scientific article; zbMATH DE number 1384387