Electronic Journal of Differential Equations,
Vol. 2004(2004), No. 95, pp. 1-14.

Title: A new look at boundary perturbations of generators

Author: Gregor Nickel (Univ. Tubingen, Germany)
 
Abstract: 
 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.
 
Submitted July 2, 2004. Published August 6, 2004.
Math Subject Classifications: 47D06, 35K05, 93B28, 93C05.
Key Words: Boundary value problems; boundary perturbation; 
        strongly continuous semigroups; operator matrices.