Linear differential equations with entire coefficients of [p,q]-order in the complex plane

In this paper, we firstly investigate the complex high order linear differential equations in which the coefficients are entire functions of [p,q]-order and obtain some results which improve and generalize some previous results in Cao (2009) [3], , Chen and Yang (2000) [4], , Heittokangas et al. (2006) [12], , Kinnunen (1998) [17], , Tu and Yi (2008) [20].