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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 20375] New: - [math] bisection root finder, safety and efficiency enhancements
Date Fri, 30 May 2003 21:58:58 GMT
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=20375

[math] bisection root finder, safety and efficiency enhancements

           Summary: [math] bisection root finder, safety and efficiency
                    enhancements
           Product: Commons
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Enhancement
          Priority: Other
         Component: Sandbox
        AssignedTo: commons-dev@jakarta.apache.org
        ReportedBy: HotFusionMan@Yahoo.com


Remove unnecessary evaluations of fa and fb; remove variable fb, whose value is
never referenced.

Tighten up evaluation of midpoint, removing explicit subtraction that could
cause loss of precision unnecessarily.

Place a safety limit on the number of iterations the bracket() method can
perform (set to Integer.MAX_VALUE) by overloading the method to provide a
maximumIterations parameter.

Lift restriction that a be the lower bound on the root and b be the upper bound
on input to bisection().  It should be allowable for a to be the upper bound and
b the lower bound.

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