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--- ndf [2019/11/18 13:34]
127.0.0.1 external edit
+++ ndf [2023/04/21 14:49] (current)
daria [NDF]
@@ Line 4: / Line 4: @@
 Applicable for **stiff** problems of **low** to **medium** accuracy.
+For some ODE problems, the step size taken by the solver is forced down to an unreasonably small level in comparison to the interval of integration, even in a region where the solution curve is smooth. These step sizes can be so small that traversing a short time interval might require millions of evaluations. This can lead to the solver failing the integration, but even if it succeeds it will take a very long time to do so.
+Equations that cause this behavior in ODE solvers are said to be stiff.
 Applicable [[Solver_settings|solver settings]]:

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