Jordan Curve
A Jordan curve is a plane curve which is topologically equivalent to (a Homeomorphic image of) the UnitCircle.
It is not known if every Jordan curve contains all four Vertices of some Square,but it has been proven true for ``sufficiently smooth'' curves and closed convex curves (Schnirelmann). For everyTriangle 
and Jordan curve 
, has an Inscribed Triangle similar to .
- Crook
- Crookedness
- Cross
- Cross-Cap
- Cross-Correlation
- Cross-Correlation Coefficient
- Cross-Correlation Theorem
- Cross Curve
- Crossed Ladders Problem
- Crossed Trough
- Cross Fractal
- Crossing Number (Graph)
- Crossing Number (Link)
- Cross of Lorraine
- Cross Polytope
- Cross Product
- Cross-Ratio
- Cross-Section
- Crout's Method
- Crowd
- Crown
- Crucial Point
- Cruciform
- Crunode
- Cryptarithm