Part of the Lecture Notes in Mathematics book series (LNM, volume 1909)

This chapter is devoted to the proof of Proposition 6.2.1 (Openness). The main ingredient of the proof is the study of the behavior of hidden isometric hemispheres, namely those isometric hemispheres which intersect the Ford domain but do not support 2-dimensional faces of the Ford domain (Definition 7.1.1).


Convex Hull Simplicial Complex Elliptic Generator Convex Polyhedron Condition Duality 
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© Springer-Verlag Berlin Heidelberg 2007

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