d'Alembert's Equation
The Ordinary Differential Equation
where
and 
and 
are given functions.- Butterfly Curve
- Butterfly Effect
- Butterfly Fractal
- Butterfly Polyiamond
- Butterfly Theorem
- Bäcklund Transformation
- Bézier Curve
- Bézier Spline
- C
- C*
- Cable Knot
- Cactus Fractal
- Cake Cutting
- Cal
- Calabi's Triangle
- Calabi-Yau Space
- Calculus
- Calculus of Variations
- Calcus
- Calderón's Formula
- C*-Algebra
- Caliban Puzzle
- Calvary Cross
- Cameron's Sum-Free Set Constant
- Cancellation