English

Maps preserving common zeros between subspaces of vector-valued continuous functions

Functional Analysis 2009-10-14 v1

Abstract

For metric spaces XX and YY, normed spaces EE and FF, and certain subspaces A(X,E)A(X,E) and A(Y,F)A(Y,F) of vector-valued continuous functions, we obtain a complete characterization of linear and bijective maps T:A(X,E)A(Y,F)T:A(X,E)\to A(Y,F) preserving common zeros, that is, maps satisfying the property \setcounter{equation}{15} \label{dub} Z(f)\cap Z(g)\neq \emptyset \Longleftrightarrow Z(Tf)\cap Z(Tg)\neq \emptyset for any f,gA(X,E)f,g\in A(X,E), where Z(f)={xX:f(x)=0}Z(f)=\{x\in X:f(x)=0\}. Moreover, we provide some examples of subspaces for which the automatic continuity of linear bijections having the property (\ref{dub}) is derived.

Keywords

Cite

@article{arxiv.0910.2358,
  title  = {Maps preserving common zeros between subspaces of vector-valued continuous functions},
  author = {Luis Dubarbie},
  journal= {arXiv preprint arXiv:0910.2358},
  year   = {2009}
}

Comments

10 pages

R2 v1 2026-06-21T13:57:40.805Z