On elliptic solutions of the quintic complex one-dimensional Ginzburg-Landau equation

The Conte-Musette method has been modified for the search of only elliptic solutions to systems of differential equations. A key idea of this a priory restriction is to simplify calculations by means of the use of a few Laurent series solutions instead of one and the use of the residue theorem. The application of our approach to the quintic complex one-dimensional Ginzburg-Landau equation (CGLE5) allows to find elliptic solutions in the wave form. We also find restrictions on coefficients, which are necessary conditions for the existence of elliptic solutions for the CGLE5. Using the investigation of the CGLE5 as an example, we demonstrate that to find elliptic solutions the analysis of a system of differential equations is more preferable than the analysis of the equivalent single differential equation.Comment: LaTeX, 21 page

Двояко-периодические мероморфные решения автономных нелинейных дифференциальных уравнений

The problem of constructing and classifying elliptic solutions of nonlinear differential equations is studied. An effective method enabling one to find an elliptic solution of an autonomous nonlinear ordinary differential equation is described. The method does not require integrating additional differential equations. Much attention is paid to the case of elliptic solutions with several poles inside a parallelogram of periods. With the help of the method we find elliptic solutions up to the fourth order inclusively of an ordinary differential equation with a number of physical applications. The method admits a natural generalization and can be used to find elliptic solutions satisfying systems of ordinary differential equations.Рассматривается задача построения и классификации эллиптических решений нелинейных дифференциальных уравнений. Описывается эффективный метод, позволяющий находить любое эллиптическое решение автономного нелинейного обыкновенного дифференциального уравнения. Метод не требует интегрирования дополнительных дифференциальных уравнений. Большое внимание уделяется методике построения эллиптических решений с несколькими полюсами в параллелограмме периодов. С помощью данного метода найден явный вид всех эллиптических решений до четвертого порядка включительно для обыкновенного дифференциального уравнения, имеющего ряд физических приложений. Рассматриваемый метод допускает естественное обобщение на случай систем обыкновенных дифференциальных уравнений

Полиномиальный метод построения равновесных конфигураций точечных вихрей на плоскости

The problem of constructing and classifying stationary and translating configurations of point vortices with an arbitrary choice of circulations is studied. The polynomial method enabling one to find any such configuration is described in detail. Stationary configurations for vortex systems with circulations Γ, −µΓ are classified in the case of integer µ. New configurations are obtained.Рассматривается вопрос построения и классификации статических и равномерно движущихся конфигураций точечных вихрей на плоскости при произвольном выборе интенсивностей вихрей. Дается детальное описание полиномиального метода, позволяющего находить любую такую конфигурацию. Проводится классификация статических конфигураций для вихрей с интенсивностями Γ, −µΓ при условии, что µ – целое число, а количество вихрей не превышает десяти. Получены новые конфигурации

Polynomial Method for Constructing Equilibrium Configurations of Point Vortices in the Plane

The problem of constructing and classifying stationary and translating configurations of point vortices with an arbitrary choice of circulations is studied. The polynomial method enabling one to find any such configuration is described in detail. Stationary configurations for vortex systems with circulations Γ, −µΓ are classified in the case of integer µ. New configurations are obtained.</p

Doubly Periodic Meromorphic Solutions of Autonomous Nonlinear Differential Equations

The problem of constructing and classifying elliptic solutions of nonlinear differential equations is studied. An effective method enabling one to find an elliptic solution of an autonomous nonlinear ordinary differential equation is described. The method does not require integrating additional differential equations. Much attention is paid to the case of elliptic solutions with several poles inside a parallelogram of periods. With the help of the method we find elliptic solutions up to the fourth order inclusively of an ordinary differential equation with a number of physical applications. The method admits a natural generalization and can be used to find elliptic solutions satisfying systems of ordinary differential equations

Polynomial Method for Constructing Equilibrium Configurations of Point Vortices in the Plane

The problem of constructing and classifying stationary and translating configurations of point vortices with an arbitrary choice of circulations is studied. The polynomial method enabling one to find any such configuration is described in detail. Stationary configurations for vortex systems with circulations Γ, −µΓ are classified in the case of integer µ. New configurations are obtained