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math.DG2008★ 4 cited
On Blocking Numbers of Surfaces
Wing Kai Ho
The blocking number of a manifold is the minimal number of points needed to block out lights between any two given points in the manifold. It has been conjectured that if the block…
math.DG2006
Manifolds without 1/k-geodesic
Wing Kai Ho
It is a question by C.Sormani that whether there exists a , such that any compact, smooth and simply connected manifold has a 1/k-geodesic. We prove in this paper…