Found 454 Documents (Results 1–100)
Four extremal solutions of discrete-time algebraic Riccati equations: existence theorems and computation. (English) Zbl 07922759
Generalizations of certain conditions for Drazin inverse expressions of anti-triangular partitioned matrices. (English) Zbl 07899636
Gradient-based iterative approach for solving constrained systems of linear matrix equations. (English) Zbl 07856758
Gaussian semigroups of operators in the space of Borel functions on a separable Hilbert space. (Russian. English summary) Zbl 07896828
On a Wilson vector-matrix functional equation. (English) Zbl 1540.39031
Melliani, Said (ed.) et al., Recent advances in fuzzy sets theory, fractional calculus, dynamic systems and optimization. Contributions based on the presentations at the international conference on partial differential equations and applications, modeling and simulation, Beni Mellal, Morocco, from June 1–2, 2021. Cham: Springer. Lect. Notes Netw. Syst. 476, 458-472 (2023).
Cosine subtraction laws. (English) Zbl 1530.39018
Aequationes Math. 97, No. 5-6, 995-1010 (2023); correction ibid. 98, No. 1, 347 (2024).
Reviewer: Mohammad Sal Moslehian (Mashhad)
Some results concerning the linear relations which are adjoint to each other. (English) Zbl 1535.39011
Reviewer: Hark-Mahn Kim (Daejeon)
Covering families of the asymmetric quantum Rabi model: \(\eta\)-shifted non-commutative harmonic oscillators. (English) Zbl 1533.81067
Linear recurrent equations in the space of convex compact sets and the diameters of their solutions. (English. Russian original) Zbl 1531.39009
Differ. Equ. 59, No. 8, 1090-1094 (2023); translation from Differ. Uravn. 59, No. 8, 1084-1088 (2023).
Reviewer: José María Almira (Murcia)
On linearized versions of matrix inequalities. (English) Zbl 1526.15019
Reviewer: Gian Luigi Forti (Milano)
A formula for gap between \(\mathbb{K}\)-relatively bounded operator matrices in non-Archimedean Banach spaces. (English) Zbl 07703370
Bilinear matrix inequalities and polynomials in several freely noncommuting variables. (English) Zbl 1526.15016
On commutators of idempotents. arXiv:2311.16724
Preprint, arXiv:2311.16724 [math.FA] (2023).
Some mathematical insights on Density Matrix Embedding Theory. arXiv:2305.16472
Preprint, arXiv:2305.16472 [math-ph] (2023).
Stability of the inverse scattering problem for the self-adjoint matrix Schrödinger operator on the half line. (English) Zbl 1535.81240
On small motions of hydraulic systems containing viscoelastic fluid. (English. Russian original) Zbl 1513.76067
J. Math. Sci., New York 267, No. 6, 716-759 (2022); translation from Itogi Nauki Tekh., Ser. Sovrem. Mat. Prilozh., Temat. Obz. 172, 48-90 (2019).
A class of semigroup homomorphisms arising from the product in a pure quartic number field. (English) Zbl 1500.39016
Differential recurrences for the distribution of the trace of the \(\beta\)-Jacobi ensemble. (English) Zbl 1496.81091
A lower bound for the spectral gap of the conjugate Kac process with 3 interacting particles. (English) Zbl 1483.82009
Regularization of the classical optimality conditions in optimal control problems for linear distributed systems of Volterra type. (English. Russian original) Zbl 1484.49008
Comput. Math. Math. Phys. 62, No. 1, 42-65 (2022); translation from Zh. Vychisl. Mat. Mat. Fiz. 62, No. 1, 45-70 (2022).
A new classification of algebraic identities for linear operators on associative algebras. (English) Zbl 1494.13034
Reviewer: Jerry M. Lodder (Las Cruces)
The eigenvalues and eigenvectors of the 5D discrete Fourier transform number operator revisited. arXiv:2210.01990
Preprint, arXiv:2210.01990 [math-ph] (2022).
The norm of an infinite \(L\)-matrix. (English) Zbl 1489.47016
Reviewer: Trieu Le (Toledo)
Alienation of Drygas’ and Cauchy’s functional equations. (English) Zbl 1476.39027
Reviewer: Stefan Czerwik (Gliwice)
On the operator equations \(A^n = A^{\ast}A\). (English) Zbl 1504.47024
Reviewer: Elena V. Tabarintseva (Chelyabinsk)
Least-squares partially bisymmetric solutions of coupled Sylvester matrix equations accompanied by a prescribed submatrix constraint. (English) Zbl 1471.15008
Matrix homomorphism equations on a class of monoids and non abelian groupoids. (English) Zbl 1473.39040
Reviewer: Mohammad Sal Moslehian (Mashhad)
A variant of d’Alembert’s and Wilson’s functional equations for \(2\times 2\) matrix valued functions. (English) Zbl 1468.39009
Reviewer: Mohammad Sal Moslehian (Mashhad)
The symmetrization problem for multiple orthogonal polynomials. (English) Zbl 1460.33005
Marcellán, Francisco (ed.) et al., Orthogonal polynomials: current trends and applications. Proceedings of the 7th EIBPOA conference, Universidad Carlos III de Madrid, Leganés, Spain, July 3–6, 2018. Cham: Springer. SEMA SIMAI Springer Ser. 22, 17-51 (2021).
An efficient iteration for the extremal solutions of discrete-time algebraic Riccati equations. arXiv:2111.08923
Preprint, arXiv:2111.08923 [math.OC] (2021).
Spectral properties of the second order difference equation with selfadjoint operator coefficients. (English) Zbl 1493.47045
Positive coincidence points for a class of nonlinear operators and their applications to matrix equations. (English) Zbl 1475.54029
On a question of D. Serre. (English) Zbl 1460.26010
Sequence of multivalued linear operators converging in the generalized sense. (English) Zbl 07290389
D’Alembert’s matrix functional equation with an endomorphism on abelian groups. (English) Zbl 1451.39021
Operator sine functions and exponential trigonometric pairs. (English. Russian original) Zbl 1451.39022
J. Math. Sci., New York 251, No. 2, 267-272 (2020); translation from Zap. Nauchn. Semin. POMI 480, 162-169 (2019).
On matrix rearrangement inequalities. (English) Zbl 1435.15016
Reviewer: Tin Yau Tam (Reno)
Discrete integral conditions for weak trajectories and asymptotic stability for operators in Banach spaces. (English) Zbl 1441.47019
Reviewer: Alexei Yu. Karlovich (Lisboa)
Riccati ADI: Existence, uniqueness and new iterative methods. arXiv:2004.11212
Preprint, arXiv:2004.11212 [math.NA] (2020).
Birkhoff-James orthogonality reversing property and its stability. (English) Zbl 1447.39016
Brzdęk, Janusz (ed.) et al., Ulam type stability. Based on the conferences on Ulam type stability (CUTS), Cluj-Napoca, Romania, July 4–9, 2016 and Timisoara, Romania, October 8–13, 2018. Cham: Springer. 57-71 (2019).
Reviewer: Eszter Gselmann (Debrecen)
Survey on Cauchy functional equation in lattice environments. (English) Zbl 1448.39042
Brzdęk, Janusz (ed.) et al., Ulam type stability. Based on the conferences on Ulam type stability (CUTS), Cluj-Napoca, Romania, July 4–9, 2016 and Timisoara, Romania, October 8–13, 2018. Cham: Springer. 1-46 (2019).
Reviewer: Eszter Gselmann (Debrecen)
A circulant functional equation for the additive function and its stability. (English) Zbl 1430.39009
Stability and numerical approximation for a spacial class of semilinear parabolic equations on the Lipschitz bounded regions: Sivashinsky equation. (English) Zbl 1449.13016
On two hydromechanical problems inspired by works of S. Krein. (English) Zbl 1425.35155
Kuchment, Peter (ed.) et al., Differential equations, mathematical physics, and applications. Selim Grigorievich Krein centennial. Providence, RI: American Mathematical Society (AMS). Contemp. Math. 734, 219-238 (2019).
Hyperbolization of second-order partial differential equations: application to the Navier-Stokes-Fourier system. (Hyperbolization of second partial differential equation: application to Navier-Stokes-Fourier system.) (English) Zbl 1429.35170
On completeness of a part of eigen and associated vectors of a quadratic operator pencil for a double-point boundary value problem. (English) Zbl 1481.47016
\(kn - 2\) scalar matrix and its functional equations by mathematical modeling. (English) Zbl 1429.39015
Ruzhansky, Michael (ed.) et al., Advanced topics in mathematical analysis. Boca Raton, FL: CRC Press. 449-468 (2019).
Reviewer: Thomas Britz (Sydney)
Reflexive periodic solutions of general periodic matrix equations. (English) Zbl 1418.15014
Reviewer: Vladimir P. Kostov (Nice)
Majorant sign of the first order for totally global solvability of a controlled functional operator equation. (Russian. English summary) Zbl 1441.47097
Relation of the Böttcher equation with the parametrized Poisson integral. (English. Russian original) Zbl 1433.30073
Vestn. St. Petersbg. Univ., Math. 51, No. 4, 373-379 (2018); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 5(63), No. 4, 614-622 (2018).
The extended Leibniz rule and related equations in the space of rapidly decreasing functions. (English) Zbl 1423.39031
Small movements of partially dissipative hydrosystem in stationary containers. (Russian. English summary) Zbl 1409.76024
Algebraic Heun operator and band-time limiting. (English) Zbl 1405.33025
Reviewer: Chrysoula G. Kokologiannaki (Patras)
Fixed-point theorem in classes of function with values in a dq-metric space. (English) Zbl 1441.39023
The Ulam stability of functional equation on matrix random normed spaces. (Chinese. English summary) Zbl 1413.39061
Positive solutions of the system of operator equations \(A_1X=C_1\), \(XA_2=C_2\), \(A_3XA^*_3=C_3\), and \(A_4XA^*_4=C_4\) in Hilbert \(C^*\)-modules. (English) Zbl 1442.39027
Operator relations characterizing derivatives. (English) Zbl 1478.47001
Cham: Birkhäuser (ISBN 978-3-030-00240-4/hbk; 978-3-030-00241-1/ebook). vi, 191 p. (2018).
Reviewer: Edward L. Pekarev (Odessa)
Convergence properties of BCR method for generalized Sylvester matrix equation over generalized reflexive and anti-reflexive matrices. (English) Zbl 1408.65020
Reviewer: Jurjen Duintjer Tebbens (Praha)
An accelerated technique for solving one type of discrete-time algebraic Riccati equations. (English) Zbl 1390.39071
Small movements of hydrosystem in stationary containers. (Russian. English summary) Zbl 1404.76074
On a double-point boundary value problem for a second order operator-differential equation and its application. (English) Zbl 1390.39082
The cosine-sine functional equation on a semigroup with an involutive automorphism. (English) Zbl 1385.39004
Reviewer: Gian Luigi Forti (Milano)
Liouville-Green (WKB) asymptotics for almost-diagonal linear second-order matrix difference equations. (English) Zbl 1386.39003
A boundary-value problem for a first-order hyperbolic system in a two-dimensional domain. (English. Russian original) Zbl 1377.35195
Izv. Math. 81, No. 3, 542-567 (2017); translation from Izv. Ross. Akad. Nauk, Ser. Mat. 81, No. 3, 83-108 (2017).
Rigidity of the chain rule and nearly submultiplicative functions. (English) Zbl 1366.39017
Klartag, Bo’az (ed.) et al., Geometric aspects of functional analysis. Israel seminar (GAFA) 2014–2016. Cham: Springer (ISBN 978-3-319-45281-4/pbk; 978-3-319-45282-1/ebook). Lecture Notes in Mathematics 2169, 235-264 (2017).
MSC:
39B42
An explicit formula for the splitting of multiple eigenvalues for nonlinear eigenvalue problems and connections with the linearization for the delay eigenvalue problem. (English) Zbl 1515.35177
On the solutions of systems of nonlinear functional equations continuous in \(t\in\mathfrak{R}\). (English. Ukrainian original) Zbl 1378.39014
J. Math. Sci., New York 222, No. 3, 237-254 (2017); translation from Neliniĭni Kolyvannya 19, No. 1, 32-47 (2016).
Reviewer: Pál Burai (Debrecen)
On the Operator-valued \(\mu\)-cosine functions. arXiv:1701.07229
Preprint, arXiv:1701.07229 [math.RT] (2017).
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