Open AccessMarkov-Kakutani Theorem on Hyperspace of a Banach Space
Author(s) -
Shueh-Inn Hu,
Thakyin Hu
Publication year - 2021
Publication title -
tamkang journal of mathematics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.324
H-Index - 18
eISSN - 0049-2930
pISSN - 2073-9826
DOI - 10.5556/j.tkjm.52.2021.3645
Subject(s) - hyperspace , mathematics , banach space , hausdorff space , metric space , regular polygon , fixed point theorem , hausdorff distance , affine transformation , discrete mathematics , compact space , pure mathematics , combinatorics , mathematical analysis , geometry
Suppose $X$ is a Banach space and $K$ is a compact convex subset of $X$. Let $\mathcal{F}$ be a commutative family of continuous affine mappings of $K$ into $K$. It follows from Markov-Kakutani Theorem that $\mathcal{F}$ has a common fixed point in $K$. Suppose now $(CC(X), h)$ is the corresponding hyperspace of $X$ containing all compact, convex subsets of $X$ endowed with Hausdorff metric $h$. We shall prove the above version of Markov-Kakutani Theorem is valid on the hyperspace $(CC(X), h)$.