Frequently dense orbits

K.-G. Grosse-Erdmann; Alfredo Peris

Comptes Rendus. Mathématique, Volume 341 (2005) no. 2 p. 123-128

Hypercyclic semigroups and somewhere dense orbits

George Costakis; Alfredo Peris

Comptes Rendus. Mathématique, Volume 335 (2002) no. 11 p. 895-898