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Information × Registration Number 0209U002399, 0106U001456 , R & D reports Title Qualitative and constrictive methods of research non-lineal differential and differential-functional equations. popup.stage_title Head Petryshyn Roman, Registration Date 11-02-2009 Organization Yuri Fedkovych Chernivtsi National University popup.description2 An averaging method is justified for multifrequence differential equation systems with delay and higher approximation systems. Conditions of the existing integral manifolds of the singularly perturbed differential-functional equations have been obtained and their properties are researched. The Koshy problem for one class of pseudodifferential systems in periodic function space is studied, model age-structured system of two interactive species is researched. Product Description popup.authors popup.nrat_date 2020-04-02 Close