An infinitesimally nonrigid polyhedron with nonstationary volume in the Lobachevsky 3-space
arXiv:1002.3884 · doi:10.1134/S0037446606010149
Abstract
We give an example of an infinitesimally nonrigid polyhedron in the Lobachevsky 3-space and construct an infinitesimal flex of that polyhedron such that the volume of the polyhedron isn't stationary under the flex.
10 pages, 2 Postscript figures