[jira] [Updated] (MATH-1015) Improper integration with one infinite limit

["Thomas Neidhart (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MATH-1015?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Thomas Neidhart updated MATH-1015:
----------------------------------
    Attachment: LaguerreTest.java
                GaussIntegratorFactory.java
                LaguerreRuleFactory.java

Attached a first version to support Gauss-Laguerre quadrature.

> Improper integration with one infinite limit
> --------------------------------------------
>
>                 Key: MATH-1015
>                 URL: https://issues.apache.org/jira/browse/MATH-1015
>             Project: Commons Math
>          Issue Type: New Feature
>            Reporter: Ajo Fod
>            Priority: Minor
>         Attachments: GaussIntegratorFactory.java, LaguerreRuleFactory.java, LaguerreTest.java
>
>
> This is about integrating a f(x) in [c, Inf] or in [-Inf, c]
> Gauss-Laguerre  (GL) can be used to integrate between [0, Inf]
> http://en.wikipedia.org/wiki/Gauss%E2%80%93Laguerre_quadrature
> With the change of variables using f(g(x))
> where g(x) = -x
> GL can be used to integrate in [-Inf,0]
> With another change of variables:
> g(x) = x+c
> one could integrate in [c, Inf]



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