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https://issues.apache.org/jira/browse/MATH-827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420353#comment-13420353
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Gilles commented on MATH-827:
-----------------------------
"IterativeLegendreGaussIntegrator" added in revision 1364444.
"LegendreGaussIntegrator" deprecated in revision 1364452.
> Replace class "LegendreGaussIntegrator" with
> "IterativeLegendreGaussIntegrator" class
> -------------------------------------------------------------------------------------
>
> Key: MATH-827
> URL: https://issues.apache.org/jira/browse/MATH-827
> Project: Commons Math
> Issue Type: Task
> Reporter: Gilles
> Assignee: Gilles
> Priority: Minor
> Labels: api-change
> Fix For: 3.1, 4.0
>
> Attachments: IterativeLegendreGaussIntegrator.java
>
>
> The "LegendreGaussIntegrator" class (in package
> "o.a.c.m.analysis.integration") has a misleading name. Internally, it uses
> the Legendre-Gauss quadrature rule on sub-intervals of the integration range
> but, additionally, it performs an iterative procedure to automatically
> determine the number of sub-intervals over which the rule will be
> successively applied.
> The strict Gauss-Legendre quadrature scheme has now been implemented (cf.
> MATH-797) in package "o.a.c.m.analysis.integration.gauss".
> I thus propose to:
> # Deprecate "LegendreGaussIntegrator" in 3.1.
> # Create a new "IterativeLegendreGaussIntegrator" class that will perform the
> same procedure as "LegendreGaussIntegrator" but will internally use the
> classes in package "o.a.c.m.analysis.integration.gauss" to perform the
> Gauss-Legendre quadrature part.
> # Remove "LegendreGaussIntegrator" in 4.0.
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