The Oscillation on Solutions of Some Classes of Linear Differential Equations with Meromorphic Coefficients of Finite[p,q]-Order

This paper considers the oscillation on meromorphic solutions of the second-order linear differential equations with the formf′′+A(z)f=0,whereA(z)is a meromorphic function with[p,q]-order. We obtain some theorems which are the improvement and generalization of the results given by Bank and Laine, Cao and Li, Kinnunen, and others.