Let X be an infinite dimensional separable Banach space. There exists a hypercyclic operator on X which is equal to the identity operator on an infinite dimensional closed subspace of X.
@article{urn:eudml:doc:44503, title = {Hypercyclic operators with an infinite dimensional closed subspace of periodic points.}, journal = {Revista Matem\'atica de la Universidad Complutense de Madrid}, volume = {16}, year = {2003}, pages = {383-390}, zbl = {1062.47012}, mrnumber = {MR2032923}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:44503} }
Grivaux, Sophie. Hypercyclic operators with an infinite dimensional closed subspace of periodic points.. Revista Matemática de la Universidad Complutense de Madrid, Tome 16 (2003) pp. 383-390. http://gdmltest.u-ga.fr/item/urn:eudml:doc:44503/