We show in this paper that the projective d-arrangement I$ a formed by the facet hyperplanes of a cross-polytope, its hyperplanes of mirror symmetry, and the hyperplane at infinity is simplicial precisely for d ~< 4. The arrangement 1$ 4 is the only simplicial d-arrangement presently known that doe
Simplicial cells in arrangements of hyperplanes
β Scribed by R. W. Shannon
- Publisher
- Springer
- Year
- 1979
- Tongue
- English
- Weight
- 322 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0046-5755
No coin nor oath required. For personal study only.
β¦ Synopsis
Let ~ be an arrangement of n hyperplanes in pa, C(,~Β’t~) its cell complex, and Hany hyperplane of~Ze. It is proved: (I) If~ is not a near pencil then there are at least n -d -I simplicial d-cells of C(,,~), each having no facet in H. (2) There are at least d + I simplicial d-cells of C(~Β’t~), each having a facet in H. Material for this paper was taken from the author's doctoral dissertation.
π SIMILAR VOLUMES
We investigate the combinatorial and topological properties of simplicial cells in arrangements of (pseudo)hyperplanes, using their interpretations in terms of oriented matroids. Simplicial cells have various applications in computational geometry due to the fact that for an arrangement in general p
We investigate several hyperplane arrangements that can be viewed as deformations of Coxeter arrangements. In particular, we prove a conjecture of Linial and Stanley that the number of regions of the arrangement x i &x j =1, 1 i< j n, is equal to the number of alternating trees on n+1 vertices. Rema