@inproceedings{4085,
  abstract     = {Let C be a cell complex in d-dimensional Euclidean space whose faces are obtained by orthogonal projection of the faces of a convex polytope in d + 1 dimensions. For example, the Delaunay triangulation of a finite point set is such a cell complex. This paper shows that the in_front/behind relation defined for the faces of C with respect to any fixed viewpoint x is acyclic. This result has applications to hidden line/surface removal and other problems in computational geometry.},
  author       = {Edelsbrunner, Herbert},
  booktitle    = {Proceedings of the 5th annual symposium on Computational geometry},
  isbn         = {978-0-89791-318-8},
  location     = {Saarbruchen, Germany},
  pages        = {145 -- 151},
  publisher    = {ACM},
  title        = {{An acyclicity theorem for cell complexes in d dimension}},
  doi          = {10.1145/73833.73850},
  year         = {1989},
}