5 citations · 9 across the 5 of their papers we have counts for
6 papers
Torsion subgroups and fixed-point rigidity in CAT(0) geometry
Jiankun Hou, Hiroyasu Izeki, Ran Ji +2
We develop new methods for studying groups acting on CAT(0) spaces, which lead to several general structural results. First, we prove that every torsion subgroup of a CAT(0) group…
Constraints on the ghost-free parity-violating gravity from Laser-ranged Satellites
Jin Qiao, Zhao Li, Ran Ji +4
This paper explores the evolutionary behavior of the Earth-satellite binary system within the framework of the ghost-free parity-violating gravity and the corresponding discussion…
Extra DoF of Near-Field Holographic MIMOCommunications Leveraging Evanescent Waves
Ran Ji, Shuo Chen, Chongwen Huang +4
In this letter, we consider transceivers with spatially-constrained antenna apertures of rectangular symmetry, and aim to improve of spatial degrees of freedom (DoF) and channel ca…
On ends of finite-volume noncompact manifolds of nonpositive curvature
Ran Ji, Yunhui Wu
In this paper we confirm a folklore conjecture which suggests that for a complete noncompact manifold of finite volume with sectional curvature , if the unive…
On the Martin boundary of rank 1 manifolds with nonpositive curvature
Ran Ji
For a manifold with nonpositive curvature, the Martin boundary is described by the behavior of normalized Green's functions at infinity. A classical result by Anderson and Schoen s…
The Asymptotic Dirichlet Problems on manifolds with unbounded negative curvature
Ran Ji
Elton P. Hsu used probabilistic method to show that the asymptotic Dirichlet problem is uniquely solvable under the curvature conditions with $η…