Implicit ordinary differential equations: Bifurcations and sharpening of equivalenceстатья
Исследовательская статья
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Автор:
Bogaevsky I.A.
Журнал:
Izvestiya. Mathematics
Том:
78
Номер:
6
Год издания:
2014
Издательство:
American Mathematical Society
Местоположение издательства:
United States
Первая страница:
1063
Последняя страница:
1078
DOI:
10.1070/IM2014v078n06ABEH002720
Аннотация:
We obtain a formal classification of generic local bifurcations of an implicit ordinary differential equation at its singular points as a single external parameter varies. This classification consists of four normal forms, each containing a functional invariant. We prove that every deformation in the contact equivalence class of an equation germ which remains quadratic in the derivative can be obtained by a deformation of the independent and dependent variables. Our classification is based on a generalization of this result for families of equations. As an application, we obtain a formal classification of generic local bifurcations on the plane for a linear second-order partial differential equation of mixed type at the points where the domains of ellipticity and hyperbolicity undergo Morse bifurcations. © 2014 Russian Academy of Sciences (DoM), London Mathematical Society, Turpion Ltd.
Добавил в систему:
Богаевский Илья Александрович