On Maps which Preserve Equality of Distance in $F^{*}$-spaces

Volume 56 / 2008

Dongni Tan Bulletin Polish Acad. Sci. Math. 56 (2008), 225-230 MSC: Primary 46A99. DOI: 10.4064/ba56-3-5


We prove that every map $T$ between two $F^{*}$-spaces which preserves equality of distance and satisfies $T(0)=0$ is linear.


  • Dongni TanSchool of Mathematical Sciences
    Nankai University
    Tianjin 300071, China

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