Sampling Theorem
In order for a band-limited (i.e., one with a zero Power Spectrum for frequencies 
) baseband (
) signal to bereconstructed fully, it must be sampled at a rate 
. A signal sampled at 
is said to be NyquistSampled, and is called the Nyquist Frequency. No information is lost if a signal is sampledat the Nyquist Frequency, and no additional information is gained by sampling faster than this rate.
- Cyclic Redundancy Check
- Cyclid
- Cyclide
- Cyclidic Coordinates
- Cycloid
- Cycloid Evolute
- Cycloid Involute
- Cycloid Radial Curve
- Cyclomatic Number
- Cyclotomic Equation
- Cyclotomic Factorization
- Cyclotomic Field
- Cyclotomic Integer
- Cyclotomic Invariant
- Cyclotomic Number
- Cyclotomic Polynomial
- Cylinder
- Cylinder Cutting
- Cylinder-Cylinder Intersection
- Cylinder Function
- Cylinder-Sphere Intersection
- Cylindrical Coordinates
- Cylindrical Equal-Area Projection
- Cylindrical Equidistant Projection
- Cylindrical Function