Summary: Sufficient conditions are established for oscillation of second order super half linear equations containing both delay and advanced arguments of the form
where ; , , and are real numbers; are continuous real-valued functions; and with . The functions , , and are allowed to change sign, provided that and are nonnegative on a sequence of intervals on which alternates sign.
As an illustrative example we show that every solution of
is oscillatory provided that either or or is sufficiently large.