Found 42 Documents (Results 1–42)
Additive decomposition of matrices under rank conditions and zero pattern constraints. (English) Zbl 07584105
Reviewer: Carlos M. da Fonseca (Safat)
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)
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)
Schur complements and state space realizations. (English) Zbl 1083.47016
Reviewer: Yuri I. Karlovich (Cuernavaca)
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)
Simultaneous reduction to triangular forms after extension with zeroes. (English) Zbl 0941.15004
Reviewer: Manuel Ladra Gonzalez (Santiago)
MSC:
15A21
Logarithmic residues, generalized idempotents, and sums of idempotents in Banach algebras. (English) Zbl 0894.46038
Factorization and job scheduling: A connection via companion based matrix functions. (English) Zbl 0862.15018
Reviewer: K.H.Kim (Montgomery)
Companion based matrix functions: Description and minimal factorization. (English) Zbl 0862.15017
Reviewer: E.Ellers (Toronto)
Variants of the two machine flow shop problem connected with factorization of matrix functions. (English) Zbl 0947.90576
MSC:
90B35
Logarithmic residues in Banach algebras. (English) Zbl 0811.46043
Reviewer: D.Khavinson (Fayetteville)
Zero sums of idempotents in Banach algebras. (English) Zbl 0811.46042
Reviewer: D.Khavinson (Fayetteville)
Complementary Schur complements. (English) Zbl 0795.15006
Reviewer: J.D.Dixon (Ottawa)
MSC:
15A21
Simultaneous reduction to triangular and companion forms of pairs of matrices: The case \(rank(I-AZ)=1\). (English) Zbl 0724.15011
Reviewer: V.Perić (Sarajevo)
MSC:
15A21
Similarity invariants for pairs of upper triangular Toeplitz matrices. (English) Zbl 0715.15005
Reviewer: L.A.Sakhnovich
Simultaneous reduction to companion and triangular forms of sets of matrices. (English) Zbl 0716.15011
Reviewer: P.M.Gibson
MSC:
15A21
Upper triangularization of matrices by permutations and lower triangular similarity transformations. (English) Zbl 0655.65046
Reviewer: L.Berg
Upper triangularization of matrices by lower triangular similarities. (English) Zbl 0645.15013
Reviewer: L.A.Sakhnovich
Complementary triangular forms of pairs of matrices, realizations with prescribed main matrices, and complete factorization of rational matrix functions. (English) Zbl 0645.15012
Reviewer: L.A.Sakhnovich
Wiener-Hopf factorization, inverse Fourier transforms and exponentially dichotomous operators. (English) Zbl 0606.47021
Fredholm theory of Wiener-Hopf equations in terms of realization of their symbols. (English) Zbl 0578.45005
An indicator for Wiener-Hopf integral equations with invertible analytic symbol. (English) Zbl 0507.45002
Decomposition of operator functions and the multiplication problem for small ideals. (English) Zbl 0435.47023
Stable factorizations of monic matrix polynomials and stable invariant subspaces. (English) Zbl 0398.47011
The integral formula for the reduced algebraic multiplicity of meromorphic operator functions. (English) Zbl 0376.47008
Characterizations of almost periodic strongly continuous groups and semigroups. (English) Zbl 0365.47019
Relative inverses of meromorphic operator functions and associated projection functions. (English) Zbl 0301.47029
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