GCOEセミナー

過去の記録 ~07/24次回の予定今後の予定 07/25~


2012年02月07日(火)

14:00-15:00   数理科学研究科棟(駒場) 370号室
Piermarco Cannarsa 氏 (Mat. Univ. Roma "Tor Vergata")
Controllability results for degenerate parabolic operators (ENGLISH)
[ 講演概要 ]
UnlikeCuniformly parabolic equations, parabolic operators that degenerate on subsets of the space domain exhibit very different behaviors from the point of view of controllability. For instance, null controllability in arbitrary time may be true or false according to the degree of degeneracy, and there are also examples where a finite time is needed to ensure such a property. This talk will survey most of the theory that has been established so far for operators with boundary degeneracy, and discuss recent results for operators of Grushin type which degenerate in the interior.