Seelmann, Albrecht2014-10-202014-10-202014https://openscience.ub.uni-mainz.de/handle/20.500.12030/2894engInC-1.0https://rightsstatements.org/vocab/InC/1.0/510 Mathematik510 MathematicsPerturbation theory for spectral subspacesDissertationurn:nbn:de:hebis:77-38625151 S.