RootsExtremaInflections-package
                        Finds Roots, Extrema and Inflection Points of a
                        Planar Curve
extremexi               Function to Find the Extreme Point of a Planar
                        Curve
inflexi                 Function to Find the Inflection Point of a
                        Planar Curve
rootexinf               Function to Find the Root, Extreme and
                        Inflection of a Planar Curve
rootxi                  Function to Find the Root of a Planar Curve
xydat                   xydat
