Знайдено простори функцій, в яких двоточкова задача utt — uxx = g(x,t), u(x, 0) = u(x,π) = 0, u(x + w) = u(x,t) має розв’язок.
Functional spaces in which two-point problem utt — uxx = g(x,t), u(x, 0) = u(x,π) = 0, u(x + w) = u(x,t) has solution are determined.