Abstract : This grant was in its final no-cost extension during academic year 1994-5. Following the PIi's move to Princeton University, te remaining funds on the grant were administered under Cornell,/Princeton Subcontract 20188-5423. They were to partially support the PI, Philip Holmes, during the academic year and summer 1995, and to support visiting faculty P.S. Krishnaprasad (University of Maryland) and F. Verhulst (University of Utrecht, Holland), as well as providing some travel nionies for the PI and Cornell students, R. Ghrist and H. DankowVcz. Work Outlined in 1993-4 report continued in a number of areas. The final publication resulting form 0. Duan's 1993 thesis appeared as did the paper with Dankowicz. That with Pratap is in press. These projects are now complete.