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Posted to issues@commons.apache.org by "Luc Maisonobe (JIRA)" <ji...@apache.org> on 2013/04/02 21:07:15 UTC

[jira] [Resolved] (MATH-960) ODE integrator do not handle some additional equations properly

     [ https://issues.apache.org/jira/browse/MATH-960?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Luc Maisonobe resolved MATH-960.
--------------------------------

    Resolution: Fixed

Fixed in subversion repository as of r1463680.
                
> ODE integrator do not handle some additional equations properly
> ---------------------------------------------------------------
>
>                 Key: MATH-960
>                 URL: https://issues.apache.org/jira/browse/MATH-960
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.1.1
>            Reporter: Luc Maisonobe
>            Assignee: Luc Maisonobe
>             Fix For: 3.2
>
>
> Differential equations may be split as a primary equation and several secondary equations. In some cases, the secondary equations may have an effect on he primary derivatives. This can be handled using the method computeDerivatives(double t, double[] primary, double[] primaryDot, double[] secondary, double[] secondaryDot) from the SecondaryEquations interface.
> However, when the secondary equations updateds the primaryDot array using this method, the update is ignored.

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