RT info:eu-repo/semantics/article T1 Null controllable sets and reachable sets for nonautonomous linear control systems A1 Fabbri, Roberta A1 Novo, Sylvia A1 Núñez Jiménez, María del Carmen A1 Obaya, Rafael K1 Nonautonomous linear control systems K1 Linear Hamiltonian systems K1 Reachable sets K1 Null controllable sets K1 Abnormal systems K1 Rotation number K1 Proper focal points AB Under the assumption of lack of uniform controllability for a family of time-dependent linear control systems, we study the dimension, topological structure and other dynamical properties of the sets of null controllable points and of the sets of reachable points. In particular, when the space of null controllable vectors has constant dimension for all the systems of the family, we find a closed invariant subbundle where the uniform null controllability holds. Finally, we associate a family of linear Hamiltonian systems to the control family and assume that it has an exponential dichotomy in order to relate the space of null controllable vectors to one of the Lagrange planes of the continuous splitting. PB American Institute of Mathematical Sciences SN 1937-1632 YR 2016 FD 2016 LK http://uvadoc.uva.es/handle/10324/25503 UL http://uvadoc.uva.es/handle/10324/25503 LA eng NO Discrete Continuous Dynamical Systems Series S 9 (4) (2016), 1069-1094 NO Producción Científica DS UVaDOC RD 22-nov-2024