01019nam a2200253 i 450099100122834970753620020507185619.0941115s1966 de ||| | eng b10818509-39ule_instLE01309010ExLDip.to MatematicaengAMS 47A55Kato, Tosio40573Perturbation theory for linear operators /Tosio KatoBerlin ; Heidelberg ; New York :Springer-Verlag,1966xvi, 590 p. :ill. ;24 cmGrundlehren der mathematischen Wissenschaften = A series of comprehensive studies in mathematics,0072-7830 ;132Perturbation theory.b1081850923-02-1728-06-02991001228349707536LE013 47A KAT11 (1966)12013000013336le013-E0.00-l- 03330.i1092528428-06-02Perturbation theory for linear operators82699UNISALENTOle01301-01-94ma -engde 01