Catalan surface
Mathematical concept / From Wikipedia, the free encyclopedia
This article is about the ruled surfaces. For the minimal surface, see Catalan's minimal surface.
In geometry, a Catalan surface, named after the Belgian mathematician Eugène Charles Catalan, is a ruled surface all of whose generators are parallel to a fixed plane.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/b/b4/Catalan_surface.gif)