Noncylindrical Ruled Surface
A Ruled Surface parameterization 
is called noncylindrical if
is nowhere 0. A noncylindrical ruled surface always has a parameterization of theform
where
and 
, where 
is called the Striction Curve of x and 
the Director Curve.See also Distribution Parameter, Ruled Surface, Striction Curve
References
Gray, A. ``Noncylindrical Ruled Surfaces.'' §17.3 in Modern Differential Geometry of Curves and Surfaces. Boca Raton, FL: CRC Press, pp. 345-349, 1993.
- Steiner's Hypocycloid
- Steiner's Porism
- Steiner's Problem
- Steiner's Segment Problem
- Steiner's Theorem
- Steiner Surface
- Steiner System
- Steiner Triple System
- Steinhaus-Moser Notation
- Steinitz's Theorem
- Steinmetz Solid
- Stella Octangula
- Stella Octangula Number
- Stellated Polyhedron
- Stellated Tetrahedron
- Stellated Truncated Hexahedron
- Stellation
- Stem-and-Leaf Diagram
- Step
- Step Function
- Step Polynomial
- Steradian
- Stereogram
- Stereographic Projection
- Stereology