Homepage of Youri Shestopalov

Hi my name is Youri Shestopalov and I'm a professor in mathematics

at the

Karlstad University


Youri Shestopalov
Karlstad University
651 88 Karlstad
SWEDEN
phone: +46-54-700 18 56
room: 1D368

Last modified: 2009 06 10

Short CV [*]

Research

Pedagogical merits. Research in didactics of mathematics [x]

Spectral theory of operator-valued functions [x]

Mathematical methods for electromagnetics and related items [xx]

Resume of research achievements

I perform research in various areas of applied and numerical mathematics, mathematical physics and mathematical modelling. In particular the methods of the spectral theory of operator-valued functions (OFVs) [1] are developed. Results are applied to solving various elliptic boundary value problems of mathematical physics, e.g. for the Maxwell equations and systems of the Helmholtz equations with piecewise constant complex-valued coefficients [2], [3] and also in unbounded domains with mixed boundary and transmission-type conditions and irregular multi-connected boundary and interface contours that stretch to infinity [4], [5]. Such problems arise also in mathematical models of multi-layer surfaces. Results are based on the development of the theory of singular integral operators and the spectral theory of integral OFVs with a logarithmic singularity of the kernel [6].
Other research fields are semilinear Helmholtz and Schrödinger equations with variable coefficients [7] and direct and inverse scattering problems in domains with noncompact boundaries [8] These problems are connected with the modeling of wave propagation in layered structures filled with nonlinear media [9], [10]. Applied studies were also focused on numerical solution to boundary value and transmission problems for the Helmholtz equations in unbounded domains by projectional methods; iteration techniques; and development of numerical methods for integral equations with a logarithmic singularity of the kernel.
The developed techniques are of universal character and have been recently developed and applied [11] to the analysis of the mathematical problems of elasticity and related items that enable one to model paper layers and surfaces using specifically created mathematical models.

Report on scientific activities in 2002--2003.

Introduction to the spectral theory of operator-valued functions with applications to the solution of boundary value problems in domains with irregular boundaries. Presentation at the mathematical seminar of the Karlstad University

Mathematical Methods for Electromagnetics: A Small Introduction and Examples


Integral equations with logarithmic kernels.

Analysis of slotted structures: Methods of operator theory and integral equations.

The details and background of the method are in the book
Logarithmic Integral Equations in Electromagnetics
published by the VSP International Science Publishers in 2000, ISBN 90-6764-322-X. See the VSP homepage www.vsppub.com

The PIERS 2000 presentations:

Analytical-to-Numerical Approach to Calculation of Eigenoscillations and Eigenwaves in Complex-Shaped Slotted Structures.

Uniqueness of Reconstructing the Permittivity and Shape for Infinite Screens with Irregularities.

Examples of the student research works associated with the main field of studies

Task 1 for modeling: Waves in the Goubau Line.
Report 1 of Task 1.

Task 2 for modeling.
Report 1 of Task 2: Fields Scattered by a Rectangular Dielectric Cylinder.

Teaching

I teach the following PhD-courses: integral equations, partial differential equations, numerical methods, and asymptotical methods.
The graduate courses are applied analysis, Fourier and vector analysis, numerical methods, mathematical modeling, mathematical physics, optimization, linear algebra.
Most of the listed courses are supported by compendiums (both in Swedish and English) The compendiums can be found below.

Integral Equations
Integral Equations.
A short course. Compendium

 

Tillämpad analys. Kursplanering

Asymptotiska metoder och gruppanalys
Asymptotiska metoder och gruppanalys. Del I. Kompendiet.
Asymptotiska metoder och gruppanalys: Kursplanering.

Matematisk fysik
Matematisk fysik I: Kursplanering.
Matematisk fysik I: Kursplanering med övningsuppgifter.
Matematisk fysik I. Kompendiet.

Analys B2
Analys B2. Schema: vektoranalys
Analys B2. Kompendium

Enskilda avsnitt
Grundläggande begrepp av vektoranalys.
Kurvor. Gradient
Divergens och rotation av vektorfält.
Kurvintegraler. Greens formel i planet.
Ytor och ytintegraler. Gauss' divergenssats.
Stokes' sats.
Laplacetransform.
Laplacetransformation av derivator och integraler. Differentialekvationer.
Heavisides stegfunktion. Diracs deltafunktion.
Faltningsregeln. Partialbråksuppdelning.
Fourierserier.
Cosinusserier och sinusserier. Fourierseriers konvergens.
Fourierserier och randvärdesproblem.
Kontinuerliga funktioner.

Lectures on Analysis B2 in English with the solved problems.

Plan of the course Analysis B2 (in English).

Fundamentals of Vector Algebra. Scalar and Vector Fields.
Curves. Gradient of a Scalar Field.
Divergence and Curl of a Vector Field.
Line Integrals. Green's Theorem in the Plane.
Surfaces and Surface Integrals. Divergence Theorem of Gauss.
Stokes's Theorem.
Laplace Transform. Inverse Transform. Linearity. Shifting.
Transforms of Derivatives and Integrals. Differential Equations.
Unit Step Function. Second Shifting Theorem. Dirac's Delta Function.
Convolution. Partial Fractions.
Fourier Series.
Even and Odd Functions. Half-Range Expansions.
Separation of Variables: Use of Fourier Series.
Heat and Wave Equations: Solution by Fourier Series
Fundamental Theorems of Real Analysis.
Dedekind Cut.


Numeriska metoder
Numeriska metoder. Del I. Kompendiet.
Numeriska metoder. Del II. Kompendiet.
Introduktion till MATLAB. Kompendiet.

Gamla tentor
Tenta Delk 02, 2002-09-25.
Tenta 1.
Tenta 2.
Tenta 3.
Tenta 4.

Matematiska modeller. Kompendiet.

Numeriska metoder.
Numeriska metoder för linjär algebra: Gausselimination.
Numeriska metoder för linjär algebra: iterativa metoder.
Numeriska metoder för linjär algebra i MATLAB.
Minsta kvadratmetoden.
Numeriska metoder f\"or differentialekvationer.

Laboration 1.
Laboration 2.

Lösningar till tenta.

Logaritmiska integralekvationer och tillämpningar på lösning av egenvärdesproblem till Helmholtzs ekvation i områden med öppningar.

Manual and Instruction of the Delkurs 3, MAA 308.

Plan of the Delkurs 3.
Instruction for students of the Delkurs 3.
Example of getting started MATLAB.
Manual of the Delkurs 3: Introduction to MATLAB. Part I: Environment. Computations. Programming.
Manual of the Delkurs 3: Introduction to MATLAB. Part II: Numerical Methods. Solving Differential Equations.

Numerical Methods

Plan of the course Mathematical modeling.

Lecture 1 of Mathematical modeling 2. Numerical Methods in General. Solution of Nonlinear Equations.
Lecture 2 of Mathematical modeling 2. Interpolation.
Lecture 3 of Mathematical modelingr 2. Splines.
Lecture 4 of Mathematical modeling 2. Numerical Integration and Differentiation.
Lecture 5 of Mathematical modeling 2. Mumerical Methods in Linear Algebra: Gauss Elimination.
Lecture 6 of Mathematical modeling 2. Numerical Methods in Linear Algebra: Solution by Iteration.
Lecture 7 of Mathematical modeling 2. Numerical Methods for First-Order Differential Equations.