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Förster, Karl-Heinz

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Author ID: forster.karl-heinz Recent zbMATH articles by "Förster, Karl-Heinz"
Published as: Foerster, K.-H.; Förster, K.-H.; Förster, Karl; Förster, Karl-Heinz
Homepage: http://www.math.berlin/nachrufe/karl-heinz-foerster.html
External Links: MGP · Wikidata · dblp · GND
Documents Indexed: 65 Publications since 1966, including 5 Books
Reviewing Activity: 29 Reviews

Publications by Year

Citations contained in zbMATH

31 Publications have been cited 99 times in 78 Documents Cited by Year
On the Collatz-Wielandt numbers and the local spectral radius of a nonnegative operator. Zbl 0693.47031
Förster, K.-H.; Nagy, B.
16
1989
The asymptotic behaviour of the reduced minimum modulus of a Fredholm operator. Zbl 0272.47020
Förster, K.-H.; Kaashoek, M. A.
13
1975
On the local spectral theory of positive operators. Zbl 0649.47001
Förster, K.-H.; Nagy, B.
9
1988
On the local spectral radius of a nonnegative element with respect to an irreducible operator. Zbl 0757.47002
Förster, K.-H.; Nagy, B.
6
1991
Über lineare, abgeschlossene Operatoren, die analytisch von einem Parameter abhängen. Zbl 0151.19204
Förster, K.-H.
5
1967
Über die Invarianz einiger Räume, die zum Operator \(T-\lambda A\) gehören. Zbl 0127.07903
Förster, K.-H.
5
1966
Nonnegative realizations of matrix transfer functions. Zbl 0989.93016
Förster, K.-H.; Nagy, B.
4
2000
Local spectral radii and Collatz-Wielandt numbers of monic operator polynomials with nonnegative coefficients. Zbl 0910.47007
Förster, K.-H.; Nagy, B.
4
1998
Some properties of the spectral radius of a monic operator polynomial with nonnegative compact coefficients. Zbl 0767.47004
Förster, K.-H.; Nagy, B.
4
1991
On the block numerical range of nonnegative matrices. Zbl 1159.15306
Förster, K.-H.; Hartanto, N.
3
2009
Spectral properties of operator polynomials with nonnegative coefficients. Zbl 1105.47016
Förster, Karl-Heinz; Nagy, Béla
3
2006
Spectral properties of rational matrix functions with nonnegative realizations. Zbl 0934.15027
Förster, K.-H.; Nagy, B.
2
1998
Transfer functions and spectral projections. Zbl 0911.47006
Förster, K.-H.; Nagy, B.
2
1998
On nonnegative realizations of rational matrix functions and nonnegative input-output systems. Zbl 0897.93017
Förster, K.-H.; Nagy, B.
2
1998
Lie and Jordan ideals in \(B(c_ 0)\) and \(B(\ell_ p)\). Zbl 0770.47021
Förster, K.-H.; Nagy, B.
2
1993
Extremal compressions and perturbations of bounded operators. Zbl 0791.47006
Förster, K.-H.; Jahn, K.
2
1992
Spectral properties of matrix and operator polynomials. Zbl 0817.47018
Förster, K.-H.; Nagy, B.
2
1992
Semi-Fredholm operators and sequence conditions. Zbl 0519.47009
Foerster, K.-H.; Liebetrau, E.-O.
2
1983
Equivalences of matrix polynomials. Zbl 1340.47030
Förster, Karl-Heinz; Nagy, Béla
1
2014
Stability of semi-Fredholm properties in complex interpolation spaces. Zbl 1241.47010
Förster, Karl-Heinz; Günther, Kerstin
1
2011
A factorization of extremal extensions with applications to block operator matrices. Zbl 1223.47025
Förster, K.-H.; Nafalska, M. M.
1
2010
Nonnegative extensions via embeddings. Zbl 1192.47020
Förster, K.-H.; Nafalska, M. M.
1
2010
Quadratic (weakly) hyperbolic matrix polynomials: direct and inverse spectral problems. Zbl 1192.47011
Azizov, T. Ya.; Dijksma, A.; Förster, K.-H.; Jonas, P.
1
2010
Recent advances in operator theory in Hilbert and Krein spaces. Papers of the 7th workshop on operator theory in Krein spaces and spectral analysis, TU Berlin, Germany, December 13–16, 2007. Dedicated to Peter Jonas. Zbl 1181.47004
Behrndt, Jussi (ed.); Förster, Karl-Heinz (ed.); Trunk, Carsten (ed.)
1
2010
On nonmonic quadratic matrix polynomials with nonnegative coefficients. Zbl 1096.15011
Förster, K.-H.; Nagy, B.
1
2006
On spectra of expansion graphs and matrix polynomials. Zbl 1016.05051
Förster, K.-H.; Nagy, B.
1
2003
On spectra of expansion graphs and matrix polynomials. II. Zbl 1020.05043
Förster, K.-H.; Nagy, B.
1
2002
Linear independence of Jordan chains. Zbl 0981.47012
Förster, K.-H.; Nagy, B.
1
2001
On extremal perturbations of semi-Fredholm operators. Zbl 0864.47003
Förster, K.-H.; Krause, M.
1
1996
On semi-Fredholm operators and the conjugate of a product of operators. Zbl 0348.47021
Förster, K.-H.; Liebetrau, E.-O.
1
1977
Über den Abschluß einiger Operatorenalgebren. Zbl 0177.17101
Förster, K.-H.
1
1969
Equivalences of matrix polynomials. Zbl 1340.47030
Förster, Karl-Heinz; Nagy, Béla
1
2014
Stability of semi-Fredholm properties in complex interpolation spaces. Zbl 1241.47010
Förster, Karl-Heinz; Günther, Kerstin
1
2011
A factorization of extremal extensions with applications to block operator matrices. Zbl 1223.47025
Förster, K.-H.; Nafalska, M. M.
1
2010
Nonnegative extensions via embeddings. Zbl 1192.47020
Förster, K.-H.; Nafalska, M. M.
1
2010
Quadratic (weakly) hyperbolic matrix polynomials: direct and inverse spectral problems. Zbl 1192.47011
Azizov, T. Ya.; Dijksma, A.; Förster, K.-H.; Jonas, P.
1
2010
Recent advances in operator theory in Hilbert and Krein spaces. Papers of the 7th workshop on operator theory in Krein spaces and spectral analysis, TU Berlin, Germany, December 13–16, 2007. Dedicated to Peter Jonas. Zbl 1181.47004
Behrndt, Jussi (ed.); Förster, Karl-Heinz (ed.); Trunk, Carsten (ed.)
1
2010
On the block numerical range of nonnegative matrices. Zbl 1159.15306
Förster, K.-H.; Hartanto, N.
3
2009
Spectral properties of operator polynomials with nonnegative coefficients. Zbl 1105.47016
Förster, Karl-Heinz; Nagy, Béla
3
2006
On nonmonic quadratic matrix polynomials with nonnegative coefficients. Zbl 1096.15011
Förster, K.-H.; Nagy, B.
1
2006
On spectra of expansion graphs and matrix polynomials. Zbl 1016.05051
Förster, K.-H.; Nagy, B.
1
2003
On spectra of expansion graphs and matrix polynomials. II. Zbl 1020.05043
Förster, K.-H.; Nagy, B.
1
2002
Linear independence of Jordan chains. Zbl 0981.47012
Förster, K.-H.; Nagy, B.
1
2001
Nonnegative realizations of matrix transfer functions. Zbl 0989.93016
Förster, K.-H.; Nagy, B.
4
2000
Local spectral radii and Collatz-Wielandt numbers of monic operator polynomials with nonnegative coefficients. Zbl 0910.47007
Förster, K.-H.; Nagy, B.
4
1998
Spectral properties of rational matrix functions with nonnegative realizations. Zbl 0934.15027
Förster, K.-H.; Nagy, B.
2
1998
Transfer functions and spectral projections. Zbl 0911.47006
Förster, K.-H.; Nagy, B.
2
1998
On nonnegative realizations of rational matrix functions and nonnegative input-output systems. Zbl 0897.93017
Förster, K.-H.; Nagy, B.
2
1998
On extremal perturbations of semi-Fredholm operators. Zbl 0864.47003
Förster, K.-H.; Krause, M.
1
1996
Lie and Jordan ideals in \(B(c_ 0)\) and \(B(\ell_ p)\). Zbl 0770.47021
Förster, K.-H.; Nagy, B.
2
1993
Extremal compressions and perturbations of bounded operators. Zbl 0791.47006
Förster, K.-H.; Jahn, K.
2
1992
Spectral properties of matrix and operator polynomials. Zbl 0817.47018
Förster, K.-H.; Nagy, B.
2
1992
On the local spectral radius of a nonnegative element with respect to an irreducible operator. Zbl 0757.47002
Förster, K.-H.; Nagy, B.
6
1991
Some properties of the spectral radius of a monic operator polynomial with nonnegative compact coefficients. Zbl 0767.47004
Förster, K.-H.; Nagy, B.
4
1991
On the Collatz-Wielandt numbers and the local spectral radius of a nonnegative operator. Zbl 0693.47031
Förster, K.-H.; Nagy, B.
16
1989
On the local spectral theory of positive operators. Zbl 0649.47001
Förster, K.-H.; Nagy, B.
9
1988
Semi-Fredholm operators and sequence conditions. Zbl 0519.47009
Foerster, K.-H.; Liebetrau, E.-O.
2
1983
On semi-Fredholm operators and the conjugate of a product of operators. Zbl 0348.47021
Förster, K.-H.; Liebetrau, E.-O.
1
1977
The asymptotic behaviour of the reduced minimum modulus of a Fredholm operator. Zbl 0272.47020
Förster, K.-H.; Kaashoek, M. A.
13
1975
Über den Abschluß einiger Operatorenalgebren. Zbl 0177.17101
Förster, K.-H.
1
1969
Über lineare, abgeschlossene Operatoren, die analytisch von einem Parameter abhängen. Zbl 0151.19204
Förster, K.-H.
5
1967
Über die Invarianz einiger Räume, die zum Operator \(T-\lambda A\) gehören. Zbl 0127.07903
Förster, K.-H.
5
1966
all top 5

Cited by 95 Authors

13 Förster, Karl-Heinz
6 Nagy, Béla
5 Thieme, Horst R.
4 Mbekhta, Mostafa
3 Zemánek, Jaroslav
3 Zima, Mirosława
2 Badea, Catalin
2 Farina, Lorenzo
2 Kallus, Paul
2 Liebetrau, E.-O.
2 Martínez, Josep
2 Mazón Ruiz, José M.
2 Meyer-Nieberg, Peter
2 Radl, Agnes
2 Tam, Bitshun
1 Afshin, Hamid Reza
1 Aiena, Pietro
1 Andreu, Fuensanta
1 Angeli, David
1 Asekritova, Irina U.
1 Barsukov, Andrey I.
1 Bart, Hans-Jörg
1 Benvenuti, Luca
1 Bertacchi, Daniela
1 Bliman, Pierre-Alexandre
1 Brešar, Matej
1 Caselles Costa, Vicent
1 Castro González, Nieves
1 Czaja, Wojciech
1 De Santis, Alberto
1 Delebecque, Francois
1 Ding, Weiwei
1 Đorđević, Dragan S.
1 El Bakkali, Abdeslam
1 Friedland, Shmuel
1 Gil’, Michael Iosif
1 Gilch, Lorenz A.
1 Gohberg, Israel
1 Guevara Vasquez, Fernando
1 Günther, Kerstin
1 Hudson, Timothy D.
1 Jaming, Philippe
1 Jin, Wen
1 Kaashoek, Marinus Adriaan
1 Kim, Kyungsup
1 Kissin, Edward V.
1 Konyukhova, O. G.
1 Kordula, Vladimír
1 Krause, Manfred
1 Kröncke, Thorsten
1 Kruglyak, Natan Ya.
1 Labrousse, Jean-Philippe Marcel
1 Lay, David Clark
1 Liang, Xing
1 Makai, Endre jun.
1 Mantile, Andrea
1 Marcoux, Laurent W.
1 Marek, Ivo
1 Martínez-Serrano, M. F.
1 Mastyło, Mieczysław
1 Matolcsi, Máté
1 Mehrmann, Volker
1 Mohamed Ahmed, M. B.
1 Monsalve, Osmin
1 Müller, Sebastian
1 Müller, Vladimír
1 Nabben, Reinhard
1 Nafalska, Maria Magdalena
1 Nikol’skiĭ, Nikolaĭ Kapitonovich
1 Poon, Pak Wai
1 Psarrakos, Panayiotis J.
1 Rakočević, Vladimir
1 Rau, René T.
1 Sarreither, Paul
1 Schmoeger, Christoph
1 Schneider, Hans
1 Shen, Wenxian
1 Shul’man, Viktor Semënovich
1 Sourour, Ahmed Ramzi
1 Stanimirović, Predrag S.
1 Tajmouati, Abdelaziz
1 Tam, Bit-Shun
1 Tirao, Juan
1 Tsatsomeros, Michael J.
1 Turner, Robert E. L.
1 Virnik, Elena
1 Webb, Benjamin Z.
1 Wu, Chufen
1 Wu, Shiow-Fang
1 Xiao, Dongmei
1 Zangiabadi, Mostafa
1 Zhang, Aijun
1 Zhao, Xiao-Qiang
1 Zucca, Fabio
1 Zurrián, Ignacio Nahuel

Citations by Year

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