Spectrum of positive type of operator functions
Matteius Langer (Stathclyde)
Tuesday 20th January, 2009 16:00-17:00 214
In many physical eigenvalue problems the eigenvalue parameter appears nonlinearly. Such problems can be studied using matrix or operator functions. In this talk operator functions in a Hilbert space are discussed which satisfy some definiteness properties on some interval. In such a situation analogues of classical concepts like spectral functions and variational principles can be established.