G. V. Virabyan, “The spectrum of a certain operator and Dirichlet's problem for the equation $\square^2u+4\frac{\partial^2}{\partial t^2}\square u+2\frac{\partial^4u}{\partial t^4}=f(x,y,z,t)$”, Dokl. Akad. Nauk SSSR, 1960, Volume 132, Number 5,Pages <nobr>986

MATHEMATICS

The spectrum of a certain operator and Dirichlet's problem for the equation $\square^2u+4\frac{\partial^2}{\partial t^2}\square u+2\frac{\partial^4u}{\partial t^4}=f(x,y,z,t)$

G. V. Virabyan

Computing Center of the Armenian Academy of Sciences

Presented: S. L. Sobolev
Received: 25.01.1960