8th International Conference on Nonlinear Functional Analysis and Applications, Chinju, Güney Kore, 9 - 13 Ağustos 2004, cilt.5, ss.127-135
In this paper, we present some Sufficient conditions under which all solutions of the fourth order nonlinear vector differential equation X-(4) + Phi(X)X + F(X, X)(X) triple over dot + G(X) + H(X) = P(t, X, X, X, X) are ultimately bounded.