Isomorphism of modular group algebras Inder Bir S. PassiSudarshan K. Sehgal OriginalPaper Pages: 65 - 73
A limit-point criterion for separated Dirac operators and a little known result on Riccati's equation Hubert Kalf OriginalPaper Pages: 75 - 82
Absolute continuity of the essential spectrum of\( - \frac{{d^2 }}{{dt^2 }} + q(t)\) without monotony ofq Johann Walter OriginalPaper Pages: 83 - 94