Invariant Manifold
When stable and unstable invariant Manifolds intersect, they do so in a Hyperbolic FixedPoint (Saddle Point). The invariantManifolds are then called Separatrices. A Hyperbolic Fixed Point is characterized by two ingoing stable Manifolds and two outgoingunstable Manifolds. In integrable systems, incoming 
and outgoing 
Manifoldsall join up smoothly.
A stable invariant Manifold of a Fixed Point 
is the set of all points 
such that the trajectory passingthrough tends to as 
.
An unstable invariant Manifold of a Fixed Point is the set of all points such that the trajectorypassing through tends to as 
.
- 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