https://elib.bsu.by:443/handle/123456789/246338 2026-04-21T10:44:05Z https://elib.bsu.by:443/handle/123456789/278141 Заглавие документа: Вестник Белорусского государственного университета. Сер. 1, Физика. Математика. Информатика. – 1996. – № 3 1996-01-01T00:00:00Z https://elib.bsu.by:443/handle/123456789/246580 Заглавие документа: Development and application of a corpus of virtual texts in MM-system Авторы: Sovpel, I. V. 1996-01-01T00:00:00Z https://elib.bsu.by:443/handle/123456789/246579 Заглавие документа: Управляемость каузальных линейных дискретных дескрипторных систем с запаздыванием Авторы: Размыслович, Г. П. Аннотация: The necessary and sufficient conditions for R0 - controllability, t1 - controllability of linear causal discrete descriptor systems with delay are investigated 1996-01-01T00:00:00Z https://elib.bsu.by:443/handle/123456789/246577 Заглавие документа: Метод энергетических неравенств и операторов осреднения Авторы: Корзюк, В. И. Аннотация: At the beginning of the article it is giving a short description of the development of Solvability Theory of Boundry Problems for Partial Linear Differential Equations with using of functional methods. After this general results on the base of energetic inequalities are stated. At the second part of the article it is proven the existence and uniqueness of a strong solution of boundary problems for hyperbolic about given vector field differential equation of the 2-nd order using method of energetic inequalities and averaging operators with variable step. Energetic inequality is derived using Silvester criteria for quadric forms 1996-01-01T00:00:00Z