Unnormalized modified KdV equation
# Unnormalized modified KdV equation

The unnormalized modified Korteweg–de Vries (KdV) equation is an integrable nonlinear partial differential equation：

    $u_{t}+u_{xxx}+\alpha u^{2}u_{x}=0\,$

where $\alpha$ is an arbitrary (nonzero) constant. See also Korteweg–de Vries equation.

This is a special case of the Gardner equation.

