Within mathematics regarding differential equations, L-stability is a special case of A-stability, a property of Runge–Kutta methods for solving ordinary differential equations.
A method is L-stable if it is A-stable and
is the stability function of the method (the stability function of a Runge–Kutta method is a rational function and thus the limit as
L-stable methods are in general very good at integrating stiff equations.
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