Search Results - "LATUSHKIN, Yuri"
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Fredholm determinants, Evans functions and Maslov indices for partial differential equations
Published in Mathematische annalen (01-06-2024)“…The Evans function is a well known tool for locating spectra of differential operators in one spatial dimension. In this paper we construct a multidimensional…”
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The essential spectrum of periodically stationary solutions of the complex Ginzburg–Landau equation
Published in Journal of evolution equations (01-09-2021)“…We establish the existence and regularity properties of a monodromy operator for the linearization of the cubic–quintic complex Ginzburg–Landau equation about…”
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3
The index formula and the spectral shift function for relatively trace class perturbations
Published in Advances in mathematics (New York. 1965) (01-05-2011)“…We compute the Fredholm index, index ( D A ) , of the operator D A = ( d / d t ) + A on L 2 ( R ; H ) associated with the operator path { A ( t ) } t = − ∞ ∞ ,…”
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4
First‐order asymptotic perturbation theory for extensions of symmetric operators
Published in Journal of the London Mathematical Society (01-11-2024)“…This work offers a new prospective on asymptotic perturbation theory for varying self‐adjoint extensions of symmetric operators. Employing symplectic…”
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Uniform bounds of families of analytic semigroups and Lyapunov Linear Stability of planar fronts
Published in Mathematische Nachrichten (01-07-2024)“…We study families of analytic semigroups, acting on a Banach space, and depending on a parameter, and give sufficient conditions for existence of uniform with…”
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Resolvent expansions for self‐adjoint operators via boundary triplets
Published in The Bulletin of the London Mathematical Society (01-12-2022)“…In this paper, we develop certain aspects of perturbation theory for self‐adjoint operators subject to small variations of their domains. We use the theory of…”
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Some results on the entropy of non-autonomous dynamical systems
Published in Dynamical systems (London, England) (02-07-2016)“…In this paper, we advance the entropy theory of discrete non-autonomous dynamical systems that was initiated by Kolyada and Snoha in 1996. The first part of…”
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The Selgrade Decomposition for Linear Semiflows on Banach Spaces
Published in Journal of dynamics and differential equations (01-09-2019)“…We extend Selgrade’s Theorem, Morse spectrum, and related concepts to the setting of linear skew product semiflows on a separable Banach bundle. We recover a…”
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The infinite dimensional Evans function
Published in Journal of functional analysis (15-03-2015)“…We introduce generalized operator valued Jost solutions of first order ill-posed differential equations on Hilbert spaces. We then construct an infinite…”
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Eigenvalues of the Linearized 2D Euler Equations via Birman–Schwinger and Lin’s Operators
Published in Journal of mathematical fluid mechanics (01-12-2018)“…We study spectral instability of steady states to the linearized 2D Euler equations on the torus written in vorticity form via certain Birman–Schwinger type…”
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11
Stability of fronts in the diffusive Rosenzweig–MacArthur model
Published in Studies in applied mathematics (Cambridge) (01-11-2024)“…We consider a diffusive Rosenzweig–MacArthur predator–prey model in the situation when the prey diffuses at a rate much smaller than that of the predator. In a…”
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The Maslov and Morse Indices for System Schrödinger Operators on ℝ
Published in Indiana University mathematics journal (01-01-2018)“…Assuming a symmetric matrix-valued potential that approaches constant endstates with a sufficient asymptotic rate, we relate the Maslov and Morse indices for…”
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Spectral analysis of Darboux transformations for the focusing NLS hierarchy
Published in Journal d'analyse mathématique (Jerusalem) (01-01-2004)“…(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image) We study Darboux-type transformations associated with the focusing nonlinear…”
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14
The Morse and Maslov indices for Schrödinger operators
Published in Journal d'analyse mathématique (Jerusalem) (01-06-2018)“…We study the spectrum of Schrödinger operators with matrixvalued potentials, utilizing tools from infinite-dimensional symplectic geometry. Using the spaces of…”
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15
The Dichotomy Theorem for evolution bi-families
Published in Journal of Differential Equations (15-10-2008)“…We prove that the operator G, the closure of the first-order differential operator − d / d t + D ( t ) on L 2 ( R , X ) , is Fredholm if and only if the not…”
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THE MORSE AND MASLOV INDICES FOR MULTIDIMENSIONAL SCHRÖDINGER OPERATORS WITH MATRIX-VALUED POTENTIALS
Published in Transactions of the American Mathematical Society (01-11-2016)“…We study the Schrödinger operator L = −Δ + V on a star-shaped domain Ω in ℝ d with Lipschitz boundary ∂Ω. The operator is equipped with quite general…”
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Spectrum of Non-planar Traveling Waves
Published in Integral equations and operator theory (01-06-2018)“…In this paper we prove that a class of non self-adjoint second order differential operators acting in cylinders Ω × R ⊆ R d + 1 have only real discrete…”
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18
Hadamard-type formulas via the Maslov form
Published in Journal of evolution equations (01-03-2017)“…Given a star-shaped bounded Lipschitz domain Ω ⊂ R d , we consider the Schrödinger operator L G = - Δ + V on Ω and its restrictions L G Ω t on the subdomains Ω…”
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19
Counting spectrum via the Maslov index for one dimensional $\theta -$periodic Schrödinger operators
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COUNTING SPECTRUM VIA THE MASLOV INDEX FOR ONE DIMENSIONAL 𝜃–PERIODIC SCHRÖDINGER OPERATORS
Published in Proceedings of the American Mathematical Society (01-01-2017)“…We study the spectrum of the Schrödinger operators with 𝑛 × 𝑛 matrix valued potentials on a finite interval subject to 𝜃–periodic boundary conditions. For…”
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