Abstract In this paper, we present a single-condition sharp criterion for the oscillation of fourth-order linear delay differential equation $$ x^{(4)}(t) + p(t)x\bigl(\tau (t)\bigr) = 0 x ( 4 ) t +</...

In this work, we study the oscillation of fourth order neutral differential equations with delay argument. By means generalized Riccati transformation technique, obtain new criteria for equation. An example is given to clarify main results in paper.