3 papers
math.FA2022
Symplectic forms on Banach spaces
Jesús M. F. Castillo, Wilson Cuellar, Manuel González Ortiz +1
We extend and generalize the result of Kalton and Swanson ( is a symplectic Banach space with no Lagrangian subspace) by showing that all higher order Rochgberg spaces $\mathf…
math.FA2019
On Disjointly singular centralizers
Jesús M. F. Castillo, Wilson Cuellar, Valentin Ferenczi +1
We study ``disjoint" versions of the notions of trivial, locally trivial, strictly singular and super-strictly singular quasi-linear maps in the context of Köthe function spaces. A…
math.FA2015
Complex structures on twisted Hilbert spaces
Jesús M. F. Castillo, Wilson Cuellar, Valentin Ferenczi +1
We investigate complex structures on twisted Hilbert spaces, with special attention paid to the Kalton-Peck space and to the hyperplane problem. We consider (nontrivial) twis…