Characteristic (Partial Differential Equation)
Paths in a 2-D plane used to transform Partial Differential Equations intosystems of Ordinary Differential Equations. They were invented by Riemann.For an example of the use of characteristics, consider the equation
Now let
. Since
it follows that
, 
, and 
. Integrating gives 
, 
, and
, where the constants of integration are 0 and 
.- Liouville's Elliptic Function Theorem
- Liouville Space
- Liouville's Phase Space Theorem
- Liouville's Rational Approximation Theorem
- Liouville's Sphere-Preserving Theorem
- Lipschitz Condition
- Lipschitz Function
- Lipschitz's Integral
- Lissajous Curve
- Lissajous Figure
- List
- Lituus
- Lituus Inverse Curve
- LLL Algorithm
- Ln
- Lobachevsky-Bolyai-Gauss Geometry
- Lobachevsky's Formula
- Lobatto Quadrature
- Lobster
- Local Cell
- Local Degree
- Local Density
- Local Density Conjecture
- Local Extremum
- Local Field