6 papers
Characterizations of Lorentz Type Sobolev Multiplier Spaces and Their Preduals
Keng Hao Ooi
We provide several characterizations of Sobolev multiplier spaces of Lorentz type and their preduals. Block decomposition and Köthe dual of such preduals are discussed. As an appli…
Some capacitary strong type inequalities and related function spaces
Keng Hao Ooi, Nguyen Cong Phuc
We verify a conjecture of D. R. Adams on a capacitary strong type inequality that generalizes the classical capacitary strong type inequality of V. G. Maz'ya. As a result, we chara…
On the Capacities Associated with Local Muckenhoupt Weights
Keng Hao Ooi
We develop a theory of capacities associated with local Muckenhoupt weights. Fundamental properties of local Muckenhoupt weights will be revisited. Weak type boundedness of nonline…
Capacitary Maximal Inequalities and Applications
You-Wei Benson Chen, Keng Hao Ooi, Daniel Spector
In this paper we introduce capacitary analogues of the Hardy-Littlewood maximal function, \begin{align*} \mathcal{M}_C(f)(x):= \sup_{r>0} \frac{1}{C(B(x,r))} \int_{B(x,r)} |f|\;dC,…
On a capacitary strong type inequality and related capacitary estimates
Keng Hao Ooi, Nguyen Cong Phuc
We establish a Maz'ya type capacitary inequality which resolves a special case of a conjecture by David R. Adams. As a consequence, we obtain several equivalent norms for Choquet i…
Characterizations of predual spaces to a class of Sobolev multiplier type spaces
Keng Hao Ooi, Nguyen Cong Phuc
We characterize preduals and Köthe duals to a class of Sobolev multiplier type spaces. Our results fit in well with the modern theory of function spaces of harmonic analysis and ar…