  We solve in the negative two open problems, related to the linear and
topological structure of the set of recurrent vectors, asked by Sophie Grivaux,
Alfred Peris and the first author of this paper. Firstly, we show that there
exist recurrent operators whose set of recurrent vectors is not dense lineable;
and secondly, we construct operators which are reiteratively recurrent and
cyclic, but whose set of reiteratively recurrent vectors is meager.

Functional Analysis;Dynamical Systems