After the fundamental theorem for nonregular reductive prehomogeneous vector spaces was proved by A. Gyoja (Tsukuba J. Math. 14 (1990), 437-457), the construction of the theory of nonregular prehomogeneous vector spaces became an interesting problem. However, only Sp n Γ GL 2 1 β 2 1 M 2n 3 is known
Uniform Partitions of 3-space, their Relatives and Embedding
β Scribed by Michel Deza; Mikhail Shtogrin
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 102 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0195-6698
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β¦ Synopsis
We review 28 uniform partitions of 3-space in order to find out which of them have graphs (skeletons) embeddable isometrically (or with scale 2) into some cubic lattice Z n . We also consider some relatives of those 28 partitions, including Archimedean 4-polytopes of Conway-Guy, non-compact uniform partitions, Kelvin partitions and those with a unique vertex figure (i.e., Delaunay star). Among the latter ones we indicate two continuums of aperiodic tilings by semi-regular 3-prisms with cubes or with regular tetrahedra and regular octahedra. In the process many new partitions are added to the incomplete cases considered here.
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