Apple
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A Kepler. 
It consists of more than half of a circular Arcrotated about an axis passing through the endpoints of the Arc. The equations of the upper and lower boundaries inthe 
-
Plane are
for
and 
. It is the outside surface of a Spindle Torus.See also Bubble, Lemon, Sphere-Sphere Intersection, Spindle Torus- Composite Knot
- Compositeness Certificate
- Compositeness Test
- Composite Number
- Composite Runs
- Composition
- Composition Series
- Composition Theorem
- Compound Interest
- Compound Polyhedron
- Computability
- Computable Function
- Computable Number
- Computational Complexity
- Concatenated Number Sequences
- Concatenation
- Concave
- Concave Function
- Concentrated
- Concentric
- Concentric Circles
- Conchoid
- Conchoid of de Sluze
- Conchoid of Nicomedes
- Concho-Spiral