Nickel, Gregor2021-04-262021-04-262004-08-06Nickel, G. (2004). A new look at boundary perturbations of generators. <i>Electronic Journal of Differential Equations, 2004</i>(95), pp. 1-14.1072-6691https://hdl.handle.net/10877/13449In this paper we show that Greiner's results on boundary perturbation can be obtained systematically and partially generalised by applying additive perturbation theorems to appropriate operator matrices.Text14 pages1 file (.pdf)enAttribution 4.0 InternationalBoundary value problemsBoundary perturbationStrongly continuous semigroupsOperator matricesArticle