Electronic Journal of Differential Equations,
Vol. 2005(2005), No. 61, pp. 1-7.

Title: Periodic solutions for planar systems with time-varying delays
       
Authors: Chuangxia Huang (Hunan Univ., Changsha, China)
         Lihong Huang  (Hunan Univ., Changsha, China)
	 Yimin Meng (Hunan Univ., Changsha, China)

Abstract: 
 This paper concerns delay differential systems that can be
 regarded as a model of two-neuron artificial neural network with
 delayed feedback. Some interesting results are obtained for the
 existence of a periodic solution for the system. Our approach is
 based on the continuation theorem of coincidence degree, and
 a-priori estimates of the periodic solutions.
 
Submitted September 22, 2004. Published June 10, 2005.
Math Subject Classifications: 34K13, 92B20.
Key Words: Differential system; neural network; periodic solution.