Geodesic
A new look at boundary perturbations of generators
Electronic journal of differential equations, Tome 2004 (2004)
In 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.
Classification : 47D06, 35K05, 93B28, 93C05
Keywords: boundary value problems, boundary perturbation, strongly continuous semigroups, operator matrices 
@article{EJDE_2004__2004__a130,
     author = {Nickel,  Gregor},
     title = {A new look at boundary perturbations of generators},
     journal = {Electronic journal of differential equations},
     year = {2004},
     volume = {2004},
     zbl = {1067.47053},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2004__2004__a130/}
}
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Nickel,  Gregor. A new look at boundary perturbations of generators. Electronic journal of differential equations, Tome 2004 (2004). http://geodesic.mathdoc.fr/item/EJDE_2004__2004__a130/