Uniform Polychora Project
The
Uniform Polychora Project
in
geometry
is a collaborative effort to recognize and standardize terms used to describe objects in
higher-dimensional spaces
. The project aims: to collect information about
uniform polychora
as well as information about
uniform polytopes
in dimension ≥ 4.; to enumerate the shapes; and eventually to make a complete list. Standard extensions and generalizations of terms and definitions allow a common vocabulary, and precise communication when necessary. While names for
polychora
are not entirely rigorous, the creation of formal or abstract names is highly desirable. Major contributors are
Jonathan Bowers
,
Norman Johnson
and
George Olshevsky
.
John Conway
and
Michael Guy
established by computer analysis that there are 64
convex
nonprismatic
uniform polychora
, in the mid-1960s.
Thorold Gosset
completely enumerated the
convex uniform polytopes with regular facets
. The convex uniform polychora are listed at George Olshevsky's Uniform Polychora website The vast majority of the
uniform polychora
were discovered by Bowers, with the
Uniform Polychora Project
finding the rest for a total of 8190 uniform polychora outside the infinite families of prismatic polychora. There are only 64 which are
convex uniform polychora
with the other 8126 being
nonconvex uniform polychora
. As to be expected, less is known about uniform polytopes in the higher spatial dimensions. Many of the terms for polychora were recently created by the prinicipal Project researchers. Terms include:
Glome
Hyperball
Hypercircle
Hypercube
Hyperplane
Hypersphere
Hyperspherical simplex
Icositetrachoron
Small ditrigonary icosidodecahedral antiprism
(Jonathan Bowerss name is
sidtidap
)
External links
*
Glossary for Hyperspace
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