Finite-dimensional perturbations of self-adjoint operators Jonathan ArazyLeonid Zelenko OriginalPaper Pages: 127 - 164
The Weyl group and the normalizer of a conditional expectation M. ArgeramiD. Stojanoff OriginalPaper Pages: 165 - 186
Invariant subspaces of nilpotent operators and LR-sequences Wing Suet LiVladimír Müller OriginalPaper Pages: 197 - 226
An inverse sturm-Liouville problem by three spectra Vyacheslav N. Pivovarchik OriginalPaper Pages: 234 - 243