This site is being phased out.
Closed curve
From Mathematics Is A Science
Revision as of 06:53, 3 September 2011 by imported>Tom
A closed curve is a curve the end point of which coincides with the initial point:
The closed curve is called simple if this is the only self-intersection.
Jordan theorem. The complement of a simple closed curve in the plane has two connected components.
Closedness is a topological invariant (see also Manifolds).