- mathematics, a
stella octangula number is a
figurate number based on the
stella octangula, of the form n(2n2 − 1). The
sequence of
stella octangula numbers is 0...
- is the only
stellation of the octahedron. It is also
called the
stella octangula (Latin for "eight-pointed star"), a name
given to it by
Johannes Kepler...
- not the sum of
proper divisors of any
positive number. It is a
stella octangula number, the
number of
spheres packed in the
shape of a
stellated octahedron...
- dual
tetrahedra is an octahedron, and this compound—called the
stella octangula—is its
first and only stellation. Correspondingly, a
regular octahedron...
- of 14 degrees.p.139 14 is also the root (non-unitary)
trivial stella octangula number,
where two self-dual
tetrahedra are
represented through figurate...
-
Stella octangula as a
faceting of the cube In geometry,
faceting (also
spelled facetting) is the
process of
removing parts of a polygon,
polyhedron or...
- into a
stella octangula, thus
forming a
compound of ten tetrahedra. Further, we can
choose one
tetrahedron from each
stella octangula, so as to derive...
-
polyhedron to the cube and one of
eight convex deltahedra. The
stella octangula, or eight-pointed star, is the only
stellation with
octahedral symmetry...
- stellations, the only
stellation of the
regular octahedron as a
stella octangula is a
compound of two self-dual
tetrahedra that
facets the cube, since...
- This
uniform polyhedron compound is a
composition of two
truncated tetrahedra,
formed by
truncating each of the
tetrahedra in the
stellated octahedron...
