Absolute Value
The absolute value of a Real Number 
is denoted 
and given by
where Sgn is the sign function.
The same notation is used to denote the Modulus of a Complex Number 
,
, a p-adic Number absolute value, or a general Valuation. TheNorm of a Vector 
is also denoted 
, although 
is more commonly used.
Other Notations similar to the absolute value are the Floor Function 
,Nint function 
, and Ceiling Function 
.
- Ramanujan Psi Sum
- Ramanujan's Hypergeometric Identity
- Ramanujan's Hypothesis
- Ramanujan's Identity
- Ramanujan's Integral
- Ramanujan's Interpolation Formula
- Ramanujan's Master Theorem
- Ramanujan's Square Equation
- Ramanujan's Sum
- Ramanujan's Sum Identity
- Ramanujan's Tau-Dirichlet Series
- Ramanujan's Tau Function
- Ramanujan Theta Functions
- Ramp Function
- Ramphoid Cusp
- Ramsey Number
- Ramsey's Theorem
- Randelbrot Set
- Random Distribution
- Random Dot Stereogram
- Random Graph
- Random Matrix
- Random Number
- Random Percolation
- Random Polynomial