N. Albuquerque

activity

20142026

most citedOptimal Hardy--Littlewood inequalities uniformly bounded by a universal constant

4 citations · 6 across the 5 of their papers we have counts for

collaborators

Showing 2026 · math.FAShow all

2 papers · 2 filters

math.FA2026

On hypercyclic and (common) upper frequently hypercyclic subspaces

Nacib G. Albuquerque, Thiago R. Alves, Geraldo Botelho +1

Let $B$ be a unilateral weighted backward shift on $ℓ_{p}$ , $1 \leq p < \infty$ , that admits a $U$ -frequently hypercyclic subspace. We prove that $B$ admits such a subsp…

math.FA2026

Geometric spaceability in sequence classes and operator ideals

Nacib G. Albuquerque, Jamilson R. Campos, Luiz Felipe P. Sousa

This paper investigates advanced notions of lineability and spaceability within the frameworks of sequence spaces and operator ideals. We propose the notion of \emph{Standard Seque…