New functions RegionPlot and RegionPlot3D have been added to the built-in Mathematica kernel.
RegionPlot includes the functionality of InequalityPlot.
RegionPlot3D includes the functionality of InequalityPlot3D.
RegionPlot displays the two-dimensional region defined by a set of inequalities:
RegionPlot3D displays the three-dimensional region defined by a set of inequalities:
ComplexInequalityPlot was available in previous versions of Mathematica and is now available on the web at library.wolfram.com/infocenter/MathSource/6817.