Výsledky vyhledávání - "SPECTRAL theory"

ON ONE PROPERTY OF THE NUMERICAL RANGE OF A TWO-PARAMETER SPECTRAL PROBLEM.

Alternate Title: ОБ ОДНОМ СВОЙСТВЕ ЧИСЛОВОГО ОБРАЗА ДВУХПАРАМЕТРИЧЕСКОЙ СПЕКТРАЛЬНОЙ ЗАДАЧИ.

Autoři: Tagi, Mustafayev Sadig Mammadov, Eldar Sh. Cumshud, Kasamanli Hamlet a další

Zdroj: German International Journal of Modern Science / Deutsche Internationale Zeitschrift für Zeitgenössische Wissenschaft. Oct2025, Issue 114, p26-30. 5p.

Témata: SELFADJOINT operators, SPECTRAL theory, VECTOR spaces, PARAMETERIZATION

Spectral Optimization of Torsional Eigenvalues for a Nonhomogeneous Fish-Bone Plate with Piers.

Autoři: Berchio, Elvise Garrione, Maurizio Patriarca, Clara

Zdroj: Applied Mathematics & Optimization. Feb2026, Vol. 93 Issue 1, p1-28. 28p.

Témata: EIGENVALUES, SPECTRAL theory, DENSITY, SUSPENSION bridges, COMPOSITE plates

Unique continuation principles for finite-element discretizations of the Laplacian

Autoři: Graham Cox Scott MacLachlan Luke Steeves

Zdroj: Linear Algebra and its Applications. 727:84-111

Témata: Mathematics - Spectral Theory, Mathematics - Analysis of PDEs, FOS: Mathematics, Mathematics - Numerical Analysis, Numerical Analysis (math.NA), Spectral Theory (math.SP), Analysis of PDEs (math.AP)

Přístupová URL adresa: http://arxiv.org/abs/2410.08963

A variant of Šemrl's preserver theorem for singular matrices

Autoři: Alexandru Chirvasitu Ilja Gogić Mateo Tomašević

Zdroj: Linear Algebra and its Applications. 724:298-319

Témata: spectrum preserver, Operator Algebras, 47A10, 47B49, 15A27, 57N35, General Topology (math.GN), singular matrix, commutativity preserver, rank, Spectral Theory, spectrum shrinker, FOS: Mathematics, Jordan homomorphism, General Topology, Operator Algebras (math.OA), Spectral Theory (math.SP)

Přístupová URL adresa: http://arxiv.org/abs/2501.18776
https://api.elsevier.com/content/article/PII:S0024379525002733?httpAccept=text/plain
https://doi.org/10.1016/j.laa.2025.06.021

Orthogonalisability of joins of graphs

Autoři: Rupert H. Levene Polona Oblak Helena Šmigoc

Zdroj: Linear Algebra and its Applications. 723:162-181

Témata: Spectral Theory, Combinatorics, FOS: Mathematics, Combinatorics (math.CO), Spectral Theory (math.SP), 15B10, 15B57, 15A18, 05C50

Přístupová URL adresa: http://arxiv.org/abs/2503.20582

The size and the spectral radius of a saturated non-covered graph.

Autoři: Wu, Zeyuan Chen, Hongzhang Li, Jianxi

Zdroj: Discrete Applied Mathematics. Dec2025, Vol. 377, p343-349. 7p.

Témata: *SPECTRAL theory, *GRAPH theory, *EIGENVALUES, *LAPLACIAN operator, *MATCHING theory

Spectral analysis of eccentricity matrix for one-point-corona of graphs.

Autoři: Pandey, Smrati Selvaganesh, Lavanya

Zdroj: Discrete Applied Mathematics. Dec2025, Vol. 376, p348-358. 11p.

Témata: *GRAPH theory, *SPECTRAL theory, *MATRICES (Mathematics)

Perfect [formula omitted]-matching, [formula omitted]-factor-critical and [formula omitted]-spectral radius.

Autoři: Niu, Mengyuan Zhang, Shanshan Wang, Xiumei

Zdroj: Discrete Applied Mathematics. Dec2025, Vol. 376, p384-393. 10p.

Témata: *MATCHING theory, *SPECTRAL theory, *MATRICES (Mathematics), *MATHEMATICS, *GRAPH connectivity, *GRAPH theory

A spectral condition for the existence of component factors in graphs.

Autoři: Zhou, Sizhong Wu, Jiancheng

Zdroj: Discrete Applied Mathematics. Dec2025, Vol. 376, p141-150. 10p.

Témata: *GRAPH theory, *SPECTRAL theory, *STAR graphs (Graph theory), *EIGENVALUES

Zeta Functions of Geometrically Finite Graphs of Groups.

Autoři: Hong, Soonki Kwon, Sanghoon

Zdroj: Annals of Combinatorics. Dec2025, Vol. 29 Issue 4, p995-1018. 24p.

Témata: *ZETA functions, *SPECTRAL theory, *LATTICE theory, *CAYLEY graphs, *GEODESIC spaces

An inverse of Furstenberg's correspondence principle and applications to van der Corput sets.

Autoři: Martín, Saúl Rodríguez¹ (AUTHOR)

Zdroj: Transactions of the American Mathematical Society. Dec2025, Vol. 378 Issue 12, p8909-8942. 34p.

Témata: *SPECTRAL theory, *SEMIGROUPS (Algebra)

On the spectra of prefix-reversal graphs.

Autoři: Blanco, Saúl A. Buehrle, Charles

Zdroj: Linear Algebra & its Applications. Dec2025, Vol. 726, p71-90. 20p.

Témata: *SPECTRAL theory, *DIRECTED graphs, *PERMUTATION groups, *CYCLIC groups, *GRAPH theory

Spectral Extrema of Graphs With Fixed Size: Forbidden a Fan Graph, a Friendship Graph, or a Theta Graph.

Autoři: Li, Shuchao Zhao, Sishu Zou, Lantao

Zdroj: Journal of Graph Theory. Dec2025, Vol. 110 Issue 4, p483-495. 13p.

Témata: *SPECTRAL theory, *GRAPH theory, *TREE graphs, *SUBGRAPHS

Quantum detection of recurrent dynamics.

Autoři: Freedman, Michael H.¹ (AUTHOR) mikehartleyfreedman@outlook.com

Zdroj: International Journal of Quantum Information. Nov2025, p1. 26p.

Témata: *HILBERT space, *SPECTRAL theory, *TENSOR algebra, *INTEGRABLE systems, *GAUGE symmetries, *QUANTUM theory

Sharp quantitative stability of the Dirichlet spectrum near the ball.

Autoři: Bucur, Dorin Lamboley, Jimmy Nahon, Mickaël a další

Zdroj: Communications on Pure & Applied Mathematics. Nov2025, p1. 70p.

Témata: *EIGENVALUES, *SPECTRAL theory, *LAPLACIAN operator, *BOUNDARY value problems, *MATHEMATICAL inequalities, *PERTURBATION theory

Spectral analysis relative to a positive operator and applications.

Autoři: Baklouti, Hamadi¹ (AUTHOR) h.baklouti@gmail.com

Zdroj: Linear & Multilinear Algebra. Nov2025, Vol. 73 Issue 16, p3652-3666. 15p.

Témata: *SPECTRUM analysis, *SPECTRAL theory, *OPERATOR functions, *HERMITIAN operators, *SELFADJOINT operators, *POSITIVE operators, *HILBERT space

A Schwarz preconditioner for the smoothed lowest-order virtual element method.

Autoři: Amey, Luis F. Calvo, Juan G. Padilla-Torres, Josué

Zdroj: Computers & Mathematics with Applications. Nov2025, Vol. 197, p71-87. 17p.

Témata: *FINITE element method, *SPECTRAL theory, *COMPUTER simulation, *SCALABILITY

Determinant, inertia, and inverse of a class of irreducible tridiagonal matrices.

Autoři: Conde, Cristian Dratman, Ezequiel Grippo, Luciano N.

Zdroj: Georgian Mathematical Journal. Oct2025, p1. 13p.

Témata: *SPECTRAL theory, *MATRICES (Mathematics), *APPLIED mathematics, *INERTIA (Mechanics), *FACTORIZATION, *INVERSE problems, *SPARSE matrices

Stability of the inverse Sturm–Liouville problem on a graph with a cycle.

Autoři: Bondarenko, Natalia Pavlovna¹ (AUTHOR) bondarenkonp@info.sgu.ru

Zdroj: Journal of Inverse & Ill-Posed Problems. Oct2025, p1. 20p.

Témata: *INVERSE problems, *SPECTRAL theory, *OPERATOR theory, *GRAPH theory, *STABILITY theory

Spectral Parameter Power Series Representation for Regular Solutions of the Radial Dirac System.

Autoři: Roque, Emmanuel Torba, Sergii M.

Zdroj: Mathematical Methods in the Applied Sciences. Oct2025, p1. 16p. 4 Illustrations.

Témata: *SPECTRAL theory, *ENERGY levels (Quantum mechanics), *CHARACTERISTIC functions, *NUMERICAL analysis, *COMPLEX numbers, *QUANTUM mechanics, *BESSEL functions