Queridos compañeros.

El Profesor Quentin Menet, Universidad de Artois (Francia), impartirá la charla titulada Invariant subspaces in Fréchet spaces en el Seminario del IUMPA el Jueves 29 a las 12:30.

Estáis todos invitados.

Resumen:

A Fréchet space X has the invariant subspace property if every
operator on X possesses a non-trivial invariant subspace.
We will first show that there exists a non-normable Fréchet space X
with the invariant subspace property and even with the hereditary
invariant subspace property, i.e every closed infinite-dimensional
subspace of X has the invariant subspace property. We will then
discuss a sufficient condition for non-normable Fréchet spaces to
not have the invariant subspace property.