q-Analog
A 
-analog, also called a q-Extension or q-Generalization, is a mathematical expression parameterized by a quantity which generalizes a known expressionand reduces to the known expression in the limit 
. There are -analogs of the Factorial,Binomial Coefficient, Derivative, Integral, Fibonacci Numbers, andso on. Koornwinder, Suslov, and Bustoz, have even managed some kind of -Fourier analysis.
The -analog of a mathematical object is generally called the ``-object'', hence q-Binomial Coefficient, q-Factorial, etc. There are generally several-analogs if there is one, and there is sometimes even a multibasic analog with independent 
, 
, ....
References
Exton, H. -Hypergeometric Functions and Applications. New York: Halstead Press, 1983.
- Random Percolation
- Random Polynomial
- Random Variable
- Random Walk
- Random Walk--1-D
- Random Walk--2-D
- Random Walk--3-D
- Range (Image)
- Range (Line Segment)
- Range (Statistics)
- Rank
- Rank (Group)
- Rank (Quadratic Form)
- Rank (Sequence)
- Rank (Statistics)
- Rank (Tensor)
- Ranunculoid
- RAT-Free Set
- Ratio
- Ratio Distribution
- Rational Approximation
- Rational Canonical Form
- Rational Cuboid
- Rational Distances
- Rational Domain