MATHEMATICA BOHEMICA, Vol. 134, No. 1, pp. 31-38, 2009

Oscillation of second order neutral delay differential equations

J. Dzurina, D. Hudakova

J. Dzurina, Department of Mathematics, Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia, e-mail: jozef.dzurina@tuke.sk; D. Hudakova-Lackova, Department of Applied Mathematics and Business Informatics, Faculty of Economics, Technical University of Kosice, Nemcovej 32, 040 01 Kosice, Slovakia, e-mail: dasa.hudakova@tuke.sk

Abstract: We establish some new oscillation criteria for the second order neutral delay differential equation
[r(t)|[x(t)+p(t)x[\tau(t)]]'|^{\alpha-1} [x(t)+ p(t)x[\tau(t)]]']' + q(t)f(x[\sigma(t)])=0.
The obtained results supplement those of Dzurina and Stavroulakis, Sun and Meng, Xu and Meng, Baculikova and Lackova. We also make a slight improvement of one assumption in the paper of Xu and Meng.

Keywords: differential equation, oscillation, second order, delay, neutral type, integral averaging method

Classification (MSC 2000): 34C10


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