@inproceedings{3549, abstract = {We study three types of spatial triangulations: Delaunay triangulations, triangulations with non-obtuse dihedral angles, and KJ-triangulations. The latter satisfy a certain angle condition useful for finite element approximation. We show that the condition for Delaunay triangulations is incomparable with the other two conditions, and that triangulations with non-obtuse dihedral angles are necessarily also KJ-triangulations. These relationships are in sharp contrast to the ones in the planar case. }, author = {Edelsbrunner, Herbert}, pages = {83 -- 89}, publisher = {Institute of the Electronics, Information and Communication Enginneers}, title = {{Spatial triangulations with dihedral angle conditions}}, year = {1989}, }