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@BOOK{Behrndt:645108,
      author       = {Behrndt, Jussi and Hassi, Seppo and Snoo, Hendrik S. V. de},
      title        = {{B}oundary {V}alue {P}roblems, {W}eyl {F}unctions, and
                      {D}ifferential {O}perators},
      address      = {Cham},
      publisher    = {Springer Nature},
      reportid     = {PUBDB-2026-00603},
      isbn         = {9783030367145},
      series       = {Monographs in Mathematics},
      pages        = {1 Online-Ressource (IX, 772 pages)},
      year         = {2020},
      abstract     = {This open access book presents a comprehensive survey of
                      modern operator techniques for boundary value problems and
                      spectral theory, employing abstract boundary mappings and
                      Weyl functions. It includes self-contained treatments of the
                      extension theory of symmetric operators and relations,
                      spectral characterizations of selfadjoint operators in terms
                      of the analytic properties of Weyl functions, form methods
                      for semibounded operators, and functional analytic models
                      for reproducing kernel Hilbert spaces. Further, it
                      illustrates these abstract methods for various applications,
                      including Sturm-Liouville operators, canonical systems of
                      differential equations, and multidimensional Schrödinger
                      operators, where the abstract Weyl function appears as
                      either the classical Titchmarsh-Weyl coefficient or the
                      Dirichlet-to-Neumann map. The book is a valuable reference
                      text for researchers in the areas of differential equations,
                      functional analysis, mathematical physics, and system
                      theory. Moreover, thanks to its detailed exposition of the
                      theory, it is also accessible and useful for advanced
                      students and researchers in other branches of natural
                      sciences and engineering},
      typ          = {PUB:(DE-HGF)3},
      url          = {https://bib-pubdb1.desy.de/record/645108},
}