Semistable
When a Prime 
divides the Discriminant of a Elliptic Curve 
, twoor all three roots of become congruent mod . An Elliptic Curve is semistable if, for all such Primes ,only two roots become Congruent mod (with more complicated definitions for 
or 3).
- Curve
- Curve of Constant Breadth
- Curve of Constant Precession
- Curve of Constant Slope
- Curve of Constant Width
- Curvilinear Coordinates
- Cushion
- Cusp
- Cusp Catastrophe
- Cusp Form
- Cusp Map
- Cusp Point
- Cutting
- Cut-Vertex
- CW-Approximation Theorem
- CW-Complex
- Transfinite Diameter
- Transfinite Number
- Transform
- Transformation
- Transitive
- Transitive Closure
- Transitive Reduction
- Transitivity Class
- Translation