papers
Publications (17)
math.NA2012
Scalable Frames
Gitta Kutyniok, Kasso A. Okoudjou, Friedrich Philipp +1
math.FA2016
The effect of perturbations of linear operators on their polar decomposition
Richard Duong, Friedrich Philipp
math.FA2014
Phase Retrieval from 4N-4 Measurements
Friedrich Philipp
math.FA2016
The Effect of Perturbations of Operator-Valued Frame Sequences and Fusion Frames on Their Duals
Gitta Kutyniok, Victoria Paternostro, Friedrich Philipp
math.SP2011
Eigenvalues in gaps of selfadjoint operators in Pontryagin spaces
Friedrich Philipp
math.SP2012
Local spectral theory for normal operators in Krein spaces
Friedrich Philipp, Vladimir Strauss, Carsten Trunk
math.SP2010
Local Definitizability of $T^{[*]}T$ and $TT^{[*]}$
Friedrich Philipp, André C. M. Ran, MichaŠWojtylak
math.SP2013
Estimates on the non-real eigenvalues of regular indefinite Sturm-Liouville problems
Jussi Behrndt, Shaozhu Chen, Friedrich Philipp +1
math.SP2011
Locally definite normal operators in Krein spaces
Friedrich Philipp
math.FA2012
The numerical range of non-negative operators in Krein spaces
Friedrich Philipp, Carsten Trunk
math.SP2011
Variation of discrete spectra of non-negative operators in Krein spaces
Jussi Behrndt, Leslie Leben, Friedrich Philipp
math.SP2011
Spectral functions of products of selfadjoint operators
Tomas Ya. Azizov, Mikhail Denisov, Friedrich Philipp
math.FA2016
Bessel orbits of normal operators
Friedrich Philipp
math.SP2014
Spectral Points of Type $Ï_+$ and Type $Ï_-$ of Closed Operators in Indefinite Inner Product Spaces
Friedrich Philipp, Carsten Trunk
math.SP2012
Bounds on the non-real spectrum of differential operators with indefinite weights
Jussi Behrndt, Friedrich Philipp, Carsten Trunk
math.FA2018
Frame Properties of Operator Orbits
Ole Christensen, Marzieh Hasannasab, Friedrich Philipp
math.SP2012
Indefinite Sturm-Liouville operators with periodic coefficients
Friedrich Philipp