Found 19 Documents (Results 1–19)
Existence of zero-damped quasinormal frequencies for nearly extremal black holes. (English) Zbl 1515.83154
Rank decomposition under zero pattern constraints and \(\mathsf{L}\)-free directed graphs. (English) Zbl 1464.15002
How small can a sum of idempotents be? (English) Zbl 1504.47063
Reviewer: Yuri I. Karlovich (Cuernavaca)
Unions of rank/trace complete preorders. (English) Zbl 1417.15019
Reviewer: Bojan Kuzma (Ljubljana)
Sums of idempotents and logarithmic residues in zero pattern matrix algebras. (English) Zbl 1334.15039
Approximately finite-dimensional Banach algebras are spectrally regular. (English) Zbl 1335.47010
Reviewer: Jaroslav Zemánek (Warszawa)
Banach algebras of quasi-triangular operators are spectrally regular. (English) Zbl 1297.47022
Reviewer: Bilal Bilalov (Baku)
Families of homomorphisms in non-commutative Gelfand theory: comparisons and examples. (English) Zbl 1262.46030
Arendt, Wolfgang (ed.) et al., Spectral theory, mathematical system theory, evolution equations, differential and difference equations. Selected papers of 21st international workshop on operator theory and applications, IWOTA10, Berlin, Germany, July 12–16, 2010. Basel: Birkhäuser (ISBN 978-3-0348-0296-3/hbk; 978-3-0348-0297-0/ebook). Operator Theory: Advances and Applications 221, 131-159 (2012).
Reviewer: Mart Abel (Tartu)
Logarithmic residues, Rouché’s theorem, and spectral regularity: The \(C^{\ast}\)-algebra case. (English) Zbl 1279.47028
Reviewer: Monika Winklmeier (Bogotá)
Spectral regularity of Banach algebras and non-commutative Gelfand theory. (English) Zbl 1268.30040
Dym, Harry (ed.) et al., A panorama of modern operator theory and related topics. The Israel Gohberg memorial volume. Basel: Birkhäuser (ISBN 978-3-0348-0220-8/hbk; 978-3-0348-0221-5/ebook). Operator Theory: Advances and Applications 218, 123-153 (2012).
Reviewer: Hu Yong-Jian (Beijing)
Trace conditions for regular spectral behavior of vector-valued analytic functions. (English) Zbl 1188.47014
Reviewer: Monika Winklmeier (Bogotá)
On the complexity of the description of \(*\)-algebra representations by unbounded operators. (English) Zbl 1014.46025
Reviewer: Atsushi Inoue (Fukuoka)
Logarithmic residues of analytic Banach algebra valued functions possessing a simply meromorphic inverse. (English) Zbl 1014.46019
Reviewer: Saulius Norvidas (Vilnius)
An integer programming problem and rank decomposition of block upper triangular matrices. (English) Zbl 0951.15013
Reviewer: Yueh-er Kuo (Knoxville)
Logarithmic residues, generalized idempotents, and sums of idempotents in Banach algebras. (English) Zbl 0894.46038
Finite sums of idempotents and logarithmic residues on connected domains. (English) Zbl 0828.30024
Reviewer: M.Reissig (Freiberg)
Zero sums of idempotents in Banach algebras. (English) Zbl 0811.46042
Reviewer: D.Khavinson (Fayetteville)
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