Roxana Popescu

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math.FA2022

Quantitative bounds for unconditional pairs of frames

Peter Balazs, Daniel Freeman, Roxana Popescu +1

We formulate a quantitative finite-dimensional conjecture about frame multipliers and prove that it is equivalent to Conjecture 1 in [SB2]. We then present solutions to the conject…

math.FA2016

Stability constants of the weak $^{*}$ fixed point property for the space $ℓ_{1}$

Emanuele Casini, Enrico Miglierina, Łukasz Piasecki +1

The main aim of the paper is to study some quantitative aspects of the stability of the weak $^{*}$ fixed point property for nonexpansive maps in $ℓ_{1}$ (shortly, $w^{*}$ -fpp). We foc…

math.FA2016

Weak $^{*}$ Fixed Point Property in $ℓ_{1}$ and Polyhedrality in Lindenstrauss Spaces

Emanuele Casini, Enrico Miglierina, Łukasz Piasecki +1

The aim of this paper is to study the $w^{*}$ -fixed point property for nonexpansive mappings in the duals of separable Lindenstrauss spaces by means of suitable geometrical propertie…

Quantitative bounds for unconditional pairs of frames

Stability constants of the weak∗ fixed point property for the space ℓ1​

Weak∗ Fixed Point Property in ℓ1​ and Polyhedrality in Lindenstrauss Spaces

Stability constants of the weak $^{*}$ fixed point property for the space $ℓ_{1}$

Weak $^{*}$ Fixed Point Property in $ℓ_{1}$ and Polyhedrality in Lindenstrauss Spaces