41 citations · 138 across the 25 of their papers we have counts for
32 papers
The Bishop-Phelps-Bollobás property for the numerical radius: a Zizler-type approach
Sun Kwang Kim, Han Ju Lee, Miguel Martin +1
We investigate the Bishop-Phelps-Bollobás property for the numerical radius (BPBp-nu) through a Zizler-type perspective on the classical Bishop-Phelps-Bollobás property (BPBp). Thi…
Linear structures of norm-attaining Lipschitz functions and their complements
Geunsu Choi, Mingu Jung, Han Ju Lee +1
We solve two main questions on linear structures of (non-)norm-attaining Lipschitz functions. First, we show that for every infinite metric space , the set consisting of Lipschi…
Daugavet and diameter two properties in Orlicz-Lorentz spaces
Anna Kamińska, Han Ju Lee, Hyung-Joon Tag
In this article, we study the diameter two properties (D2Ps), the diametral diameter two properties (diametral D2Ps), and the Daugavet property in Orlicz-Lorentz spaces equipped wi…
On the Crawford number attaining operators
Geunsu Choi, Han Ju Lee
We study the denseness of Crawford number attaining operators on Banach spaces. Mainly, we prove that if a Banach space has the RNP, then the set of Crawford number attaining opera…
Diameter two properties in some vector-valued function spaces
Han Ju Lee, Hyung-Joon Tag
We introduce a vector-valued version of a uniform algebra, called the vector-valued function space over a uniform algebra. The diameter two properties of the vector-valued function…
On various types of density of numerical radius attaining operators
Sheldon Dantas, Sun Kwang Kim, Han Ju Lee +1
In this paper, we are interested in studying two properties related to the denseness of the operators which attain their numerical radius: the Bishop-Phelps-Bollobás point and oper…