On Delay‐Independent Criteria for Oscillation of Higher‐Order Functional Differential Equations

We investigate the oscillation of the following higher‐order functional differential equation: x(n)(t) + q(t) | x(t − τ)|λ−1x(t − τ) = e(t), where q(t) and e(t) are continuous functions on [t0, ∞), 1 > λ > 0 and τ ≠ 0 are constants. Unlike most of delay‐dependent oscillation results in the literature, two delay‐independent oscillation criteria for the equation are established in both the case τ > 0 and the case τ