Neumann problem in the non-classical treatment for a fourth order pseudoparabolic equation

In the paper, the Neumann problem with non-classical boundary conditions not requiring agreement conditions in considered for a pseudoparabolic equation of fourth order. The equivalence of the conditions with classic boundary condition is substantiated in the case if the solution of the stated problem is sought in S.L. Sobolev space W
_p
^(2,2)
(G).