non-existence of concave functions on metric spaces
non-existence of concave functions on metric spaces
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度量空间上不存在凹函数
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通讯作者:
江寅
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作者:
江寅
In the paper \cite{yau1974convex}, Yau proved that: There is no non-trivial continuous concave function on a complete manifold with finite volume. We prove analogue theorems for several metric spaces, including Alexandrov spaces with curvature bounded below/above, $C^{\alpha}$-H\"older Riemannian manifolds.