Fourier Transform--Heaviside Step Function
where
is the Heaviside Step Function and 
is the Delta Function.See also Heaviside Step Function- Cauchy's Cosine Integral Formula
- Cauchy Sequence
- Cauchy's Formula
- Cauchy's Rigidity Theorem
- Cauchy Test
- Caustic
- Cavalieri's Principle
- Cayley Algebra
- Cayley-Bacharach Theorem
- Cayley Cubic
- Cayley Graph
- Cayley-Hamilton Theorem
- Cayleyian Curve
- Cayley-Klein-Hilbert Metric
- Cayley-Klein Parameters
- Cayley Number
- Cayley's Group Theorem
- Cayley's Hypergeometric Function Theorem
- Cayley's Ruled Surface
- Cayley's Sextic
- Cayley's Sextic Evolute
- Cayley Tree
- C-Curve
- C-Determinant
- Cech Cohomology