Some New Oscillation Results for Fourth-Order Neutral Differential Equations with a Canonical Operator

By this work, our aim is to study oscillatory behaviour of solutions to 4th-order differential equation of neutral type Ly′+∑j=1kqjyzβgjy=0 where Ly=ξyw‴yα,wy:=zy+ryzg˜y. By using the comparison method with first-order differential inequality, we find new oscillation conditions for this equation