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https://issues.apache.org/jira/browse/MATH-172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12605227#action_12605227
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Arne Dieckmann commented on MATH-172:
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It would be great to have a Bader-Deuflhard or Gear algorithm in the package.
As far as I know, these are "state of the art" and they would probably be of
great usefulness for many users. Please consider adding them to the package, it
is worth the work.
> implementation of implicit Runge-Kutta method for stiff differential equations
> ------------------------------------------------------------------------------
>
> Key: MATH-172
> URL: https://issues.apache.org/jira/browse/MATH-172
> Project: Commons Math
> Issue Type: Improvement
> Affects Versions: 1.2
> Reporter: James Housden
> Assignee: Luc Maisonobe
> Fix For: 2.0
>
>
> In version 1.2 several explicit Runge-Kutta methods have been implemented
> which work fine for non-stiff problems. However these methods are not
> suitable for stiff equations. The implementation of an implicit Runge-Kutta
> method such as Radau5 would extend the functionality of the ode package to
> cover the solution of stiff ordinary differential equations.
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