Cover Image

Eigenvalue collision and exotic preservers on semisimple operators

Fuente: arXiv

Saved in:

Bibliographic Details
Main Author:	Chirvasitu, Alexandru
Format:	Preprint
Published:	2026
Subjects:	Spectral Theory Combinatorics Functional Analysis General Topology 15A86, 47B49, 47B15, 54D05, 47A10, 51A05, 39A70, 47B39
Online Access:	Acceder al recurso
Tags:	Add Tag No Tags, Be the first to tag this record!

Similar Items

Continuous spectrum-shrinking maps and applications to preserver problems
by: Chirvasitu, Alexandru, et al.
Published: (2025)

Forms of biisometric operators and biorthogonality
by: Duggal, B. P., et al.
Published: (2024)

A variant of Šemrl's preserver theorem for singular matrices
by: Chirvasitu, Alexandru, et al.
Published: (2025)

The combinatorics of permuting and preserving curve-bound spectra
by: Chirvasitu, Alexandru
Published: (2026)

On Jensen Functional, Convexity and Uniform Convexity
by: Abramovich, Shoshana
Published: (2024)

More on Jensen functional and convexity
by: Abramovich, Shoshana
Published: (2024)

Normal approximations of commuting square-summable matrix families
by: Chirvasitu, Alexandru
Published: (2024)

The Friedrichs extension of a class of discrete symplectic systems
by: Zemánek, Petr
Published: (2024)

Linear maps preserving the Cullis' determinant. II
by: Guterman, Alexander, et al.
Published: (2025)

Linear maps preserving the Cullis' determinant. I
by: Guterman, Alexander, et al.
Published: (2025)

On positive decompositions and proper splittings of Hermitian operators
by: Fongi, Guillermina, et al.
Published: (2024)

A geometric construction of isospectral magnetic graphs
by: Fabila-Carrasco, John Stewart, et al.
Published: (2022)

Minimal compact operators, subdifferential of the maximum eigenvalue and semi-definite programming
by: Bottazzi, Tamara, et al.
Published: (2024)

Sign regularity preserving linear operators
by: Choudhury, Projesh Nath, et al.
Published: (2024)

On the Genericity of the Spectrum Intervalization for Multi-Frequency Quasiperiodic Schrödinger Operators
by: Piao, Daxiong
Published: (2026)

Resolvent and spectrum for discrete symplectic systems in the limit point case
by: Zemánek, Petr
Published: (2024)

$A$-Davis-Wielandt Radius Bounds of Semi-Hilbertian Space Operators
by: Guesba, Messaoud, et al.
Published: (2024)

Berezin number and Berezin norm inequalities via Moore-Penrose inverse
by: Mahapatra, Saikat, et al.
Published: (2025)

Universality arising from invertible weighted composition operators
by: Abadías, Luciano, et al.
Published: (2024)

Algebraic identities for linear operators on associative triple systems (long version)
by: Bremner, Murray R.
Published: (2025)

Cesàro-Hardy operators on $L^p[0,1]$: fine spectrum, weighted Koopman semigroups and invariant subspaces
by: Abadías, Luciano, et al.
Published: (2026)

Symmetries and reflections from composition operators in the disk
by: Andruchow, Esteban, et al.
Published: (2023)

Spectral selections, commutativity preservation and Coxeter-Lipschitz maps
by: Chirvasitu, Alexandru
Published: (2025)

Krein-Šmul'jan Theorem Revisited
by: Zerbo, Santiago gonzalez, et al.
Published: (2025)

Relative residual bounds for eigenvalues in gaps of the essential spectrum
by: Seelmann, Albrecht
Published: (2023)

Discrete approximations to Dirichlet and Neumann Laplacians on a half-space and norm resolvent convergence
by: Cornean, Horia, et al.
Published: (2022)

Optimal discrete Hardy-Rellich-Birman inequalities
by: Štampach, František, et al.
Published: (2024)

Effective Operators in the Theory of Composites: Hilbert Space Framework
by: Welters, Aaron
Published: (2025)

A direct and algebraic characterization of higher-order differential operators
by: Fechner, Włodzimierz, et al.
Published: (2025)

Hyperinvariant subspaces for trace class perturbations of normal operators and decomposability
by: Gallardo-Gutiérrez, Eva A., et al.
Published: (2025)

On Simultaneous Triangularization of Matrices and Quasinilpotency of Commutator of Compact Operators
by: Patnaik, Sasmita, et al.
Published: (2024)

Gershgorin-Type Spectral Inclusions for Matrices
by: Chandler-Wilde, Simon N., et al.
Published: (2024)

Finite rank perturbations of normal operators: hyperinvariant subspaces and a problem of Pearcy
by: Gallardo-Gutiérrez, Eva A., et al.
Published: (2024)

Second-order derivations of function spaces -- a characterization of second-order differential operators
by: Fechner, Włodzimierz, et al.
Published: (2025)

Geometric means of HPD GLT matrix-sequences: a maximal result beyond invertibility assumptions on the GLT symbols
by: Ilyas, Asiim, et al.
Published: (2025)

Continuum limit for Laplace and Elliptic operators on lattices
by: Mikami, Keita, et al.
Published: (2023)

The C$^*$-algebra of a composition reflection
by: Andruchow, Esteban
Published: (2025)

Classes of operators related to subnormal operators
by: Curto, Raúl E., et al.
Published: (2024)

New Properties and Refined Bounds for the $q$-Numerical Range
by: Rashid, Mohammad H. M.
Published: (2025)

On spectral inclusion and mapping theorems for scalar type spectral operators and semigroups
by: Markin, Marat V.
Published: (2020)