1 citations · 5 across the 13 of their papers we have counts for
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On ordinal ranks of Baire class functions
Denny H. Leung, Hong-Wai Ng, Wee-Kee Tang
The theory of ordinal ranks on Baire class 1 functions developed by Kechris and Loveau was recently extended by Elekes, Kiss and Vidnyánszky to Baire class functions for any co…
Persistence of Banach lattices under nonlinear order isomorphisms
Denny H. Leung, Wee-Kee Tang
Ordered vector spaces E and F are said to be order isomorphic if there is a (not necessarily linear) bijection between them that preserves order. We investigate some situations und…
Nonlinear order isomorphisms on function spaces
Denny H. Leung, Wee-Kee Tang
Let be a topological space. A subset of , the space of continuous real-valued functions on , is a partially ordered set in the pointwise order. Suppose that and $Y…
Banach-Stone Theorems for maps preserving common zeros
Denny H. Leung, Wee-Kee Tang
Let and be completely regular spaces and and be Hausdorff topological vector spaces. We call a linear map from a subspace of into a \emph{Bana…
Semilattice Structures of Spreading Models
Denny H. Leung, Wee-Kee Tang
Given a Banach space X, denote by SP_{w}(X) the set of equivalence classes of spreading models of X generated by normalized weakly null sequences in X. It is known that SP_{w}(X) i…
Minimality properties of Tsirelson type spaces
Denka Kutzarova, Denny Leung, Antonis Manoussakis +1
In this paper, we study minimality properties of partly modified mixed Tsirelson spaces. A Banach space with a normalized basis (e_k) is said to be subsequentially minimal if for e…