Geodesic
The exact formula for the optimal parameter of the ROS4 schemes
Matematičeskoe modelirovanie, Tome 19 (2007) no. 11, pp. 96-98.

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The ROS4 schemes depending on one parameter are used often to calculate stiff systems of differential equations. The optimal values of the parameter are those, when the scheme occurs L1-stable. The analytic formula is found for these parameter values. 
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N. N. Kalitkin. The exact formula for the optimal parameter of the ROS4 schemes. Matematičeskoe modelirovanie, Tome 19 (2007) no. 11, pp. 96-98. http://geodesic.mathdoc.fr/item/MM_2007_19_11_a10/

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