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Information × Registration Number 0205U007042, 0102U004992 , R & D reports Title Asymptotic methods and approximation algorithms of investigation of differential and functional- differential equations popup.stage_title Head Roman Petryshyn, Registration Date 13-12-2005 Organization Yuri Fedkovych Chernivtsi National University popup.description2 Object of investigation - nonlinear smooth and impulse oscillatory systems with slowly changeable frequencies, systems of differential-functional equations with after-effects and parabolic equations with partial derivatives. Purpose - development of constructive methods of qualitative research of regularly and singularly disturbed differential and differential-functional equations. Results - we have justified the average method, the method of integral manifolds and asymptotic methods for some classes of multifrequency impulse and differential-functional equations. Thanks to these methods we have solved a number of initial and boundary problems as well as problems of decomposition of movements.5635 Product Description popup.authors popup.nrat_date 2020-04-02 Close