51 citations · 143 across the 27 of their papers we have counts for
29 papers
Transformations preserving the norm of means between positive cones of general and commutative -algebras
Yunbai Dong, Lei Li, Lajos Molnar +1
In this paper, we consider a (nonlinear) transformation of invertible positive elements in -algebras which preserves the norm of any of the three fundamental means of posi…
Bregman nonexpansive type actions of semitopological semigroups
Bui Ngoc Muoi, Ngai-Ching Wong
Let be a semitopological semigroup, and let be a nonempty closed convex subset of a reflexive Banach space. Under some amenability conditions on , we provide existence r…
Super Asymptotically Nonexpansive Actions of Semitopological Semigroups on Frechet and Locally Convex Spaces
Bui Ngoc Muoi, Ngai-Ching Wong
Let LUC be the space of left uniformly continuous functions on a semitopological semigroup . Suppose that is right reversible and has a left inv…
On a variant of Tingley's problem for some function spaces
Chi-Wai Leung, Chi-Keung Ng, Ngai-Ching Wong
Let and be two arbitrary measure spaces, and . Set $$L^p(μ)_+^\mathrm{sp}:= \{f\in L^p(μ): \|f\|_p =1; f\geq 0\ μ\tex…
Fixed point theorems of various nonexpansive actions of semitopological semigroups on weakly/weak* compact convex sets
Bui Ngoc Muoi, Ngai-Ching Wong
Let be a right reversible semitopological semigroup, and let be the space of left uniformly continuous functions on . Suppose that $\operatorname{LUC…
Nonsurjective maps between rectangular matrix spaces preserving disjointness, triple products, or norms
Chi-Kwong Li, Ming-Cheng Tsai, Ya-Shu Wang +1
Let be the space of real or complex rectangular matrices. Two matrices are disjoint if and . In this paper, a char…