@inbook{3282887e2984471a9c05aa4def1ba989,

title = "Elliptic operators, Dirichlet-to-Neumann maps and quasi boundary triples",

abstract = "The notion of quasi boundary triples and their Weyl functions is reviewed and applied to self-adjointness and spectral problems for a class of elliptic, formally symmetric, second order partial differential expressions with variable coefficients on bounded domains.",

keywords = "extension theory, Dirichlet-to-Neumann maps, symmetric operators, quasi boundary triple",

author = "Jussi Behrndt and Matthias Langer",

year = "2012",

month = oct,

language = "English",

isbn = "9781107606111",

series = "London Mathematial Society Lecture Note Series",

publisher = "Cambridge University Press",

pages = "121--160",

editor = "Seppo Hassi and {de Snoo}, {Hendrik S. V.} and Szafraniec, {Franciszek Hugon}",

booktitle = "Operator Methods for Boundary Value Problems",

address = "United Kingdom",

}