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The flattening of a spheroid (also called oblateness) is denoted epsilon or f (Snyder 1987, p. 13). It is defined as epsilon={(a-c)/a=1-c/a oblate; (c-a)/a=c/a-1 prolate, (1) ...

A stellation is said to be fully supported if all its included cells are supported, i.e., if all its bottom faces are covered by their adjacent cells. In other words, every ...

A ruled surface is called a generalized cone if it can be parameterized by x(u,v)=p+vy(u), where p is a fixed point which can be regarded as the vertex of the cone. A ...

A glome is a 4-sphere (in the geometer's sense of the word) x^2+y^2+z^2+w^2=r^2 (as opposed to the usual 3-sphere). The term derives from the Latin "glomus" meaning "ball of ...

The dual of the uniform great rhombicosidodecahedron U_(67) and Wenninger dual W_(105).

The dual of the uniform great rhombicuboctahedron and Wenninger dual W_(85).

The dual of the great dirhombicosidodecahedron U_(75) and Wenninger dual W_(119).

The dual of the great truncated cuboctahedron U_(20) and Wenninger dual W_(93).

The dual of the great truncated icosidodecahedron U_(68) and Wenninger dual W_(108).

The dual of the great ditrigonal dodecicosidodecahedron U_(42) and Wenninger dual W_(81).