Trilinear Polar
Given a Triangle Center 
, the line
is called the trilinear polar of
and is denoted 
.See also Chasles's Polars Theorem- Lorentz Tensor
- Lorentz Transformation
- Lorenz System
- Lorraine Cross
- Lo Shu
- Lotka-Volterra Equations
- Low-Dimensional Topology
- Lower Bound
- Lower Denjoy Sum
- Lower Integral
- Lower Limit
- Lower Sum
- Lower-Trimmed Subsequence
- Lowest Terms Fraction
- Loxodrome
- Lozenge
- Lozenge Method
- Lozi Map
- Lp'-Balance Theorem
- L-Polyomino
- L-Series
- L-System
- Lucas Correspondence
- Lucas Correspondence Theorem
- Lucas-Lehmer Residue