Ashyralyev, А.; Ashyralyyev, А.; Abdalmohammed, B.
(«Академик Е.А. Бөкетов атындағы Қарағанды университеті» КЕАҚ баспасы, 2023-03-30)
In the present paper, the initial value problem for the hyperbolic type involutory in t second order linear
partial differential equation is studied. The initial value problem for the fourth order partial differential
equations ...