The Bellows Conjecture
Does every non-rigid polyhedron have constant volume under flexing, as do all known examples? This is the bellows conjecture that one cannot construct a polyhedral bellows.
George W. Hart's Pavilion of Polyhedreality
Regular Polyhedra
The Geometry Junkyard
Mathematical Atlas
R. Connelly, A flexible sphere, Math. Intelligencer 1(1978) 130-131.
R. Connelly, The rigidity of polyhedral surfaces, Math. Mag., 52 (1979) 275-283.
H. Croft, K. Falconer & R. Guy,
Unsolved Problems in Geometry,
Springer-Verlag (1991) 61-65.
B. Roth, Rigid and flexible frameworks, Amer. Math. Monthly, 88 (1981) 6-21.
PREV: Steffen's Simplest Known Flexible Octahedron
NEXT: List of Keywords
Illustrated by Jonathan Shum
Center for Intelligent Machines
McGill University, Montreal, Canada.