[jira] [Resolved] (MATH-794) LP on android devices

["Luc Maisonobe (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MATH-794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Luc Maisonobe resolved MATH-794.
--------------------------------

    Resolution: Invalid

According to user, a simpler problem provided the same result on Android and desktop environment. So the problem was elsewhere.
                
> LP on android devices
> ---------------------
>
>                 Key: MATH-794
>                 URL: https://issues.apache.org/jira/browse/MATH-794
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.0
>         Environment: Android 2.2 JDK 1.6
>            Reporter: Sylvain Roussé
>              Labels: android
>
> When I express a Linear Programming problem in a Pure Java environment, I get a solution A.
> When I express thje same linear programming problem in a Java Android environment using the same problem modelling classes, I get a solution A', which doesn't match the constraints I express.
> For instance, If I have a set of Xi variables, with each Xi >= 0, I can get some Xj < 0.
> Or if I have Xi >= a, then in the solution, I can have Xi < a.
> I noticed that for freechart library, they have made a special library for android (Jfreecharrtt for pure javan Afreechart for Android).
> I have tried to compile the source with my android app, but the problem is the same.
> Is it necessary to have a library built up for android devices ?
> Is it possible to have commons-math for android ?
> In advance thanks.
> Regards.
> Sylvain.

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