Courant-Friedrichs-Lewy condition

Courant is a namesake of the Courant-Friedrichs-Lewy condition and the Courant minimax principle.

The upwind scheme is stable if the following Courant-Friedrichs-Lewy condition (CFL) condition is satisfied.

The Courant-Friedrichs-Lewy condition (CFL condition)

In mathematics, the Courant-Friedrichs-Lewy condition (CFL condition) is a necessary condition for convergence while solving certain partial differential equations (usually hyperbolic PDEs) numerically by the method of finite differences.