Pair Sum
Given an Amicable Pair 
, the quantity
is called the pair sum, where
is the Divisor Function and 
is the Restricted Divisor Function. See also Amicable Pair- Log Likelihood Procedure
- Log Normal Distribution
- Logos
- Log-Series Distribution
- Log-Weibull Distribution
- Lommel Differential Equation
- Lommel Function
- Lommel Polynomial
- Lommel's Integrals
- Long Division
- Long Exact Sequence of a Pair Axiom
- Longitude
- Long Prime
- Look and Say Sequence
- Loop (Algebra)
- Loop Gain
- Loop (Graph)
- Loop (Knot)
- Loop Space
- Lorentz Group
- Lorentzian Distribution
- Lorentzian Function
- Lorentz Tensor
- Lorentz Transformation
- Lorenz System