In geometry, a flexible polyhedron is a polyhedral surface without any boundary edges, whose shape can be continuously changed while keeping the shapes...
10 KB (907 words) - 12:32, 26 August 2021
In geometry, a polyhedron (pl.: polyhedra or polyhedrons; from Greek πολύ (poly-) 'many' and ἕδρον (-hedron) 'base, seat') is a three-dimensional figure...
87 KB (9,892 words) - 04:42, 24 August 2024
polyhedron, after Steffen's polyhedron.p.16 If three tetrahedra are joined at two separate opposing edges and made into a single flexible polyhedron,...
19 KB (2,055 words) - 19:18, 22 August 2024
polymer Flexible algebra, in non-associative algebras, for example alternative algebras Flexible polyhedron Flexible single master operation "Flexible", a...
1 KB (149 words) - 07:41, 18 June 2021
In geometry, Steffen's polyhedron is a flexible polyhedron discovered (in 1978) by and named after Klaus Steffen [de]. It is based on the Bricard octahedron...
3 KB (260 words) - 16:36, 27 September 2022
a member of a family of flexible polyhedra constructed by Raoul Bricard in 1897. The overall shape of one of these polyhedron may change in a continuous...
10 KB (1,155 words) - 23:18, 10 June 2023
is a "shaky polyhedron", meaning that (like a flexible polyhedron) it is not infinitesimally rigid. Outlining the edges of this polyhedron with struts...
16 KB (1,628 words) - 03:07, 18 March 2024
invariant is zero. The Dehn invariant of a self-intersection-free flexible polyhedron is invariant as it flexes. Dehn invariants are also an invariant...
40 KB (5,770 words) - 21:54, 21 August 2024
peak or (n−3)-face of the polyhedron Edge the ridge or (n−2)-face of the polyhedron Face the facet or (n−1)-face of the polyhedron Vertex the (n−4)-face of...
30 KB (2,685 words) - 07:39, 28 July 2024
Apeirohedron Bicupola Cupola Bifrustum Boerdijk–Coxeter helix Császár polyhedron Flexible polyhedron Gyroelongated square dipyramid Heronian tetrahedron Hexagonal...
47 KB (3,580 words) - 17:01, 29 June 2024