Since each face has point symmetry, a parallelepiped is a zonohedron.
2.
Most attacks secretly employ the point symmetry group of the system of geodesic equations.
3.
For example, it arises as the point symmetry group of a certain ordinary differential equation.
4.
Also the whole parallelepiped has point symmetry " C i " ( see also triclinic ).
5.
Since each of its faces has point symmetry ( equivalently, 180?rotational symmetry ), the truncated icosidodecahedron is a zonohedron.
6.
There are four basic isometries of 4-dimensional point symmetry : reflection symmetry, rotational symmetry, rotoreflection, and double rotation.
7.
A common subunits puts two rings of six subunits side by side along the sixfold axis ( or 2-6-point symmetry ).
8.
For restricted versions of this problem, there exist polynomial time algorithms that solve the corresponding optimization problems for a few point symmetries in 2D.
9.
In these cases the iron-pyrite FeS 2, where sulfur ions occupy lattice site of point symmetry group " C " 3.
10.
Roughly speaking, a Lie point symmetry of a system is a local group of transformations that maps every solution of the system to another solution of the same system.
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