Open AccessThe solvability conditions for the second order nonlinear differential equation with unbounded coefficients in L2(R)
Author(s) -
A.N. Yesbayev,
Myrzagali N. Ospanov
Publication year - 2021
Publication title -
ķaraġandy universitetìnìn̦ habaršysy. matematika seriâsy
Language(s) - English
Resource type - Journals
eISSN - 2663-5011
pISSN - 2518-7929
DOI - 10.31489/2021m1/104-110
Subject(s) - mathematics , mathematical analysis , zero (linguistics) , infinity , nonlinear system , differential equation , function (biology) , order (exchange) , domain (mathematical analysis) , characteristic equation , physics , philosophy , linguistics , finance , quantum mechanics , evolutionary biology , economics , biology
The article deals with the existence of a generalized solution for the second order nonlinear differential equation in an unbounded domain. Intermediate and lower coefficients of the equation depends on the required function and considered smooth. The novelty of the work is that we prove the solvability of a nonlinear singular equation with the leading coefficient not separated from zero. In contrast to the works considered earlier, the leading coefficient of the equation can tend to zero, while the intermediate coefficient tends to infinity and does not depend on the growth of the lower coefficient. The result obtained formulated in terms of the coefficients of the equation themselves; there are no conditions on any derivatives of these coefficients.