過去の記録 ~09/30次回の予定今後の予定 10/01~

担当者 河野俊丈


16:00-16:50   数理科学研究科棟(駒場) 002号室
Hans-Otto Walther 氏 (University of Giessen)
The semiflow of a delay differential equation on its solution manifold (ENGLISH)
[ 講演概要 ]
The lecture surveys work after the turn of the millenium on well-posedness of initial value problems for di_erential equations with variable delay. The focus is on results which provide continuously di_erentiable solution operators, so that in case studies ingredients of dynamical systems theory, such as local invariant manifolds or Poincar_e return maps, become available. We explain why the familar theory of retarded functional di_erential equations [1,2,4] fails for equations with variable delay, discuss what has been achieved for the latter, for autonomous and for nonautonomous equations, with delays bounded or unbounded, and address open problems.
[ 参考URL ]