Transitive Closure
The transitive closure of a binary Relation 
on a Set 
is the minimal Transitive relation 
on that contains . Thus 
for any elements 
and 
of provided that there exist 
, 
, ..., 
with 
, 
, and 
for all 
.
- 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
- Lorraine Cross
- Lo Shu
- Lotka-Volterra Equations
- Low-Dimensional Topology
- Lower Bound