C. Ng

activity

19972026

most citedOn quaternionic functional analysis

23 citations · 120 across the 33 of their papers we have counts for

collaborators

Showing 2020Show all

3 papers · 1 filter

math.MG2020

Coarse metric and uniform metric

Chi-Keung Ng

We introduce the notion of coarse metric. Every coarse metric induces a coarse structure on the underlying set. Conversely, we observe that all coarse spaces come from a particular…

math.FA2020

On a variant of Tingley's problem for some function spaces

Chi-Wai Leung, Chi-Keung Ng, Ngai-Ching Wong

Let $(Ω, A, μ)$ and $(Γ, B, ν)$ be two arbitrary measure spaces, and $p \in [1, \infty]$ . Set $$L^p(μ)_+^\mathrm{sp}:= \{f\in L^p(μ): \|f\|_p =1; f\geq 0\ μ\tex…

math.DG2020

Analytic bundle structure on the idempotent manifold

Chi-Wai Leung, Chi-Keung Ng

Let $X$ be a (real or complex) Banach space, and $I (X)$ be the set of all (non-zero and non-identity) idempotents; i.e., bounded linear operators on $X$ whose squares equ…