activity
19932023
most citedNumerical index and duality

51 citations · 118 across the 25 of their papers we have counts for

collaborators

33 papers

math.FA2023

On Wolfgang Lusky's paper "The Gurarij spaces are unique''

Dirk Werner

This note surveys Wolfgang Lusky's proof of uniqueness of the Gurariy spaces and mentions further developments.

math.FA2021

The Perfekt theory of -ideals

Dirk Werner

We revisit some ideas of K.-M.~Perfekt who has provided an elegant framework to detect the biduality between function or sequence spaces defined in terms of some - resp.\ -co…

math.FA2019

Norm attaining operators of finite rank

Vladimir Kadets, Gines Lopez, Miguel Martin +1

We provide sufficient conditions on a Banach space in order that there exist norm attaining operators of rank at least two from into any Banach space of dimension at least…

math.FA2018

Totally smooth renormings

Eve Oja, Tauri Viil, Dirk Werner

We study the problem of totally smooth renormings of Banach spaces and provide such renormings for spaces which are weakly compactly generated. We also consider renormings for $(a,…

math.FA2017★ 8 cited

Equivalent norms with an extremely nonlineable set of norm attaining functionals

Vladimir Kadets, Gines Lopez Perez, Miguel Martin +1

We present a construction that enables one to find Banach spaces whose sets of norm attaining functionals do not contain two-dimensional subspaces and such that, conseq…

math.FA2017

Operations with slicely countably determined sets

Vladimir Kadets, Antonio Pérez, Dirk Werner

The notion of slicely countably determined (SCD) sets was introduced in 2010 by A.~Avilés, V.~Kadets, M.~Martín, J.~Merí and V.~Shepelska. We solve in the negative some natural que…