caa a22 4500 475797418 CHVBK 20180406123728.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1007/s000330050201 doi (NATIONALLICENCE)springer-10.1007/s000330050201 Some non-selfadjoint problems on the circle [Elektronische Daten] [J. A. Lubary, J. de Solà-Morales] Abstract.: The non-selfadjoint nature of some second order differential equations with periodic boundary conditions is exhibited by describing properties of its spectrum, such as geometric and algebraic multiplicities and existence of nonreal eigenvalues. Birkhäuser Verlag, Basel,, 2000 Key words. Non-selfadjoint operators, periodic boundary conditions, nonreal eigenvalues, multiplicities nationallicence Lubary J. A. Dept. Matemàtica Aplicada II, Universitat Politècnica de Catalunya, E-08028 Barcelona, Spain, ES aut de Solà-Morales J. Dept. Matemàtica Aplicada I, Universitat Politècnica de Catalunya, E-08028 Barcelona, Spain, ES aut https://doi.org/10.1007/s000330050201 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s000330050201 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lubary J. A. Dept. Matemàtica Aplicada II, Universitat Politècnica de Catalunya, E-08028 Barcelona, Spain, ES aut NATIONALLICENCE 700 1- de Solà-Morales J. Dept. Matemàtica Aplicada I, Universitat Politècnica de Catalunya, E-08028 Barcelona, Spain, ES aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer