[jira] [Commented] (MATH-172) implementation of implicit Runge-Kutta method for stiff differential equations

["Stefan Hubert (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MATH-172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15265548#comment-15265548 ] 

Stefan Hubert commented on MATH-172:
------------------------------------

Hi everyone,

Is there any update on this?
It seems like that there is already quite a lot work done. So I wonder what needs to be done to get this released?

I am in academia and we start using Java more and more in student projects for dynamic simulation. The non-stiff solver and the whole package is awesome. 

Thank you!

> 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: 4.0
>
>         Attachments: bdf-2009-07-07.patch
>
>
> 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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