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math.MG2014★ 16 cited
A notion of nonpositive curvature for general metric spaces
Miroslav Bačák, Bobo Hua, Jürgen Jost +2
We introduce a new definition of nonpositive curvature in metric spaces and study its relationship to the existing notions of nonpositive curvature in comparison geometry. The main…
math.MG2011★ 27 cited
Geometric analysis aspects of infinite semiplanar graphs with nonnegative curvature
Bobo Hua, Jürgen Jost, Shiping Liu
In the present paper, we apply Alexandrov geometry methods to study geometric analysis aspects of infinite semiplanar graphs with nonnegative combinatorial curvature in the sense o…