Fixed point theorems for metric spaces with a conical geodesic bicombing
Fixed point theorems for metric spaces with a conical geodesic bicombing
复制标题
具有圆锥测地线双梳的度量空间的不动点定理
DOI:
10.1017/etds.2016.106
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发表时间:
2015
影响因子:
0.9
通讯作者:
Giuliano Basso
中科院分区:
文献类型:
--
作者:
Giuliano Basso
We derive two fixed point theorems for a class of metric spaces that includes all Banach spaces and all complete Busemann spaces. We obtain our results by the use of a $1$ -Lipschitz barycenter construction and an existence result for invariant Radon probability measures. Furthermore, we construct a bounded complete Busemann space that admits an isometry without fixed points.