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

被引:7
|
作者
Dubarbie, Luis [1 ]
机构
[1] Univ Cantabria, Dept Matemat Estadist & Computac, Fac Ciencias, Santander 39071, Spain
关键词
Preserving common zeros map; Vector-valued continuous function; Automatic continuity; BANACH-STONE THEOREM; BISEPARATING MAPS; SPACES;
D O I
10.1007/s11117-010-0046-z
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Formetric spaces X and Y, normed spaces E and F, and certain subspaces A(X, E) and 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) preserving common zeros, that is, maps satisfying the property Z(f) boolean AND Z( g) not equal O double left right arrow Z (T f) boolean AND Z(Tg) not equal circle divide for any f, g is an element of A(X, E), where Z( f) = {x is an element of X: f (x) = 0}. Moreover, we provide some examples of subspaces for which the automatic continuity of linear bijections having the property (P) is derived.
引用
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页码:695 / 703
页数:9
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