• openAccess   On unitary representability of topological groups 

      Galindo, Jorge Springer Verlag (2009)
      We prove that the additive group (E*, τ k (E)) of an -Banach space E, with the topology τ k (E) of uniform convergence on compact subsets of E, is topologically isomorphic to a subgroup of the unitary group of some Hilbert ...
    • openAccess   On various types of density of numerical radius attaining operators 

      Dantas, Sheldon; Kim, Sun Kwang; Lee, Han Ju; Mazzitelli, Martin Taylor and Francis (2023)
      In this paper, we are interested in studying Bishop-Phelps-Bollob´as type properties related to the denseness of the operators which attain their numerical radius. We prove that every Banach space with a micro-transitive ...