Symmetric duality for invex multiobjective fractional variational problems

We introduce a symmetric dual for multiobjective fractional variational problems. Under certain invexity assumptions we establish weak, strong and converse duality theorems as well as self-duality relations. The paper includes an extension of previous symmetric duality results for the static case obtained by Weir to the dynamic case.  2003 Elsevier Inc. All rights reserved.