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The nature of the essential spectrum in curved quantum waveguides
We study the nature of the essential spectrum of the Dirichlet Laplacian in tubes about infinite curves embedded in Euclidean spaces....
BE - Teoretická fyzika
- 2004 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
On the essential spectrum of a Stokes-type operator arising from flow around a rotating body in the Lq framework
The paper presents the description of the essential spectrum of a linear Stokes-type operator arising from the mathematical model of fluid flow around rotating bodies. The operator is considered in the space Lq(Omega) where Omega is...
BA - Obecná matematika
- 2007 •
- D
Rok uplatnění
D - Stať ve sborníku
Spectral properties in Lq of an Oseen operator modeling fluid flow past a rotating body
We study the spectrum of a linear Oseen-type operator which arises from equations of motion of a viscous incompressible fluid in the exterior of a rotating compact body. We prove that the essential spectrum consists of an i...
BA - Obecná matematika
- 2010 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Spectral analysis of a Stokes-type operator arising from flow around a rotating body
of the essential spectrum for exterior domains.We consider the spectrum of the Stokes operator with and without rotation that the spectrum as a set in C does not change with q is an element of (1, infinity), but i...
BA - Obecná matematika
- 2011 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Stability of Steady State and Traveling Waves Solutions in Coupled Map Lattices
We determine the essential spectrum of certain types of linear operators which arise in study of the stability of steady state or traveling wave solutions in coupled map lattices. The basic tool is the Gelfand transformation which e...
BA - Obecná matematika
- 2008 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Bound states in waveguides with complex Robin boundary conditions
to non-self-adjoint PT-symmetric Robin boundary conditions. Its spectrum is found to be purely essential and real for constant boundary conditions. The influence of the perturbation in the boundary conditions on the threshold of th...
BE - Teoretická fyzika
- 2016 •
- Jx •
- Link
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Výsledek na webu
On the spectrum of convolution operator with a potential
to zero at infinity. We study both the essential and the discrete spectra of this operator. It is shown that the essential spectrum of the sum is the union of the essential spectrum of the convolution ope...
Applied mathematics
- 2023 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Magnetic Schroedinger operator with the potential supported in a curved two-dimensional strip
. We show that the magnetic field does not change the essential spectrum of this system, and investigate a sufficient condition for the discrete spectrum of $H......
Pure mathematics
- 2024 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Construction of self-adjoint differential operators with prescribed spectral properties
with prescribed essential spectrum.) review how one can construct domains or potentials such that the essential or discrete spectrum of a Schrodinger operator of a certain type (e.g. the Neumann is to emphasize th...
Pure mathematics
- 2022 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Spectra of definite type in waveguide models
on realness of weakly coupled bound states and of low lying essential spectrum in the PT the low lying essential spectrum and exclude the accumulation of non-real eigenvalues from this part of the essential
Applied mathematics
- 2017 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
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