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Posted to issues@commons.apache.org by "Dennis Hendriks (JIRA)" <ji...@apache.org> on 2011/08/30 12:49:37 UTC

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

    [ https://issues.apache.org/jira/browse/MATH-172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13093640#comment-13093640 ] 

Dennis Hendriks commented on MATH-172:
--------------------------------------

>From the looks of the comments, there has been no update on this issue in over a year. What is the current status? Has any work been done in the last year? Also, is a stiff ODE solver still planned for the 3.0 release?

> 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: 3.0
>
>         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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