Location of the spectrum of operator matrices which are associated to second order equations

Autor: Jacob, Birgit
Matična publikacija: Operators and matrices (2007)

Spectral points of type π+ and type π- of closed operators in indefinite inner product spaces

Autor: Philipp, Friedrich
Matična publikacija: Operators and matrices (2015)

Variational principles for self-adjoint operator functions arising from second-order systems

Autor: Jacob, Birgit, Langer, Matthias, Trunk, Carsten
Matična publikacija: Operators and matrices (2016)