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From "Gilles (JIRA)" <>
Subject [jira] [Updated] (MATH-995) Adaptive division of segments in Quadrature Legendre-Gauss
Date Thu, 04 Jul 2013 13:55:48 GMT


Gilles updated MATH-995:

    Attachment: gaussian__sigma_1000_zoom.png

I attached plots that hint to why the "IterativeGaussLegendreIntegrator" is not adapted to
this particular change of variable.
It appears to be a limitation of the algorithm but not a bug in the implementation.
> Adaptive division of segments in Quadrature  Legendre-Gauss
> -----------------------------------------------------------
>                 Key: MATH-995
>                 URL:
>             Project: Commons Math
>          Issue Type: Bug
>            Reporter: Ajo Fod
>         Attachments: gaussian__sigma_1000.png, gaussian__sigma_1000_zoom.png, gaussian__sigma_1.png,
patch-code, patch-code, patch-code, patch-test
> I think the existing Legendre-Gauss object fails for certain integrals. An example of
failure and a solution that divides segments based on error is provided. Please let me know
if I'm not using the Legendre-Gauss object correctly.

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