Electronic Journal of Differential Equations,
Vol. 2007(2007), No. 134, pp. 1-7.

Title: Sectorial oscillation of linear differential equations 
       and iterated order

Authors: Zhao-Jun Wu  (Xianning Univ., Hubei, China)
         Dao-chun Sun (South China Normal Univ., Guangzhou, China)

Abstract: 
 In the present paper, we investigate higher order linear
 differential equations with entire coefficients of iterated order.
 Using value distribution theory of transcendental meromorphic
 functions and covering surface theory, we extend a result
 on the order of growth of solutions published by
 Bank and Langley [2].

Submitted June 26 2007. Published October 12, 2007.
Math Subject Classifications: 34M10, 30D35.
Key Words: Iterated order; iterated convergence exponent.