Nicht-S-hermitesche Rand- und Eigenwertprobleme.
Nonlinear Extensions of Limit-Point Criteria.
On the GBDT Version of the Bäcklund-Darboux Transformation and its Applications to Linear and Nonlinear Equations and Weyl Theory
A general theorem on the GBDT version of the Bäcklund-Darboux transformation for systems depending rationally on the spectral parameter is treated and its applications to nonlinear equations are given. Explicit solutions of direct and inverse problems for Dirac-type systems, including systems with singularities, and for the system auxiliary to the N-wave equation are reviewed. New results on explicit construction of the wave functions for radial...
On the limit-3 classification of the square of a second-order, linear differential expression
On the spectrum of non-selfadjoint differential operators.
On the transformation theory of ordinary second-order linear symmetric differential expressions
Periodic solutions to a -Laplacian neutral Rayleigh equation with deviating argument
By using the coincidence degree theory, we study a type of -Laplacian neutral Rayleigh functional differential equation with deviating argument to establish new results on the existence of -periodic solutions.
Quasilinear and quadratic singularly perturbed Neumann's problem
The problem of existence and asymptotic behaviour of solutions of the quasilinear and quadratic singularly perturbed Neumann's problem as a small parameter at the highest derivative tends to zero is studied.
Remarks on Some Dirichlet Type Results for Semibounded Sturm-Liouville Operators.
Some Remarks on a Separation and Limit - point Criterion of Second-order, Ordinary Differential Expressions.
The HELP inequality for Hamiltonian systems.
Weyl-Titchmarsh theory for Hamiltonian dynamic systems.
Weyl-Titchmarsh theory for time scale symplectic systems on half line.
Востановление несамосопряженных дифференциальных операторов на полуоси по матрице Вейля