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Information × Registration Number 0220U100418, 0119U102369 , R & D reports Title Geometric and analytical methods for studying extremal problems and partial differential equations popup.stage_title Head Denega Iryna V., Кандидат фізико-математичних наук Registration Date 17-01-2020 Organization The Institute of Mathematics of NASU popup.description2  In the work effective above estimates for maximums of products of the inner radii of non-intersecting regions on ray systems of points of a complex plane are obtained for all possible values ​​of some parameter and conditions under which in the proved results the structure of points is not important are established; as a result, the corresponding results are obtained for the case where the points are placed on unit circle and the corresponding statements provided for the case when areas are mirror-symmetric about the unit circle. The lower ball volume estimates for homeomorphic mappings relative to a non-conformal module in multidimensional Euclidean space are obtained. The class of quaternionic functions analytic by Hausdorff is determined, the relation between the known classes of quaternionic differential functions and the functions analytic by Hausdorff is established, the relation between the known definitions of derivatives and the derivative of Hausdorff is established. Product Description popup.authors Klishchuk Bogdan A. Shpakivskyi Vitalii S. popup.nrat_date 2020-04-02 Close