Oscillation theorems for certain even order neutral differential equations
Qi Gui Yang, Sui-Sun Cheng (2007)
Archivum Mathematicum
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This paper is concerned with a class of even order nonlinear differential equations of the form where is even and . By using the generalized Riccati transformation and the averaging technique, new oscillation criteria are obtained which are either extensions of or complementary to a number of existing results. Our results are more general and sharper than some previous results even for second order equations.