] makes a density plot of f as a function of x and y.
DensityPlot evaluates its arguments in a non-standard way (see Section A.4.2). You should use Evaluate to evaluate the function to be plotted if this can safely be done before specific numerical values are supplied.
DensityPlot has the same options as DensityGraphics, with the following additions: DensityPlot has the default option setting Frame
DensityPlot returns a DensityGraphics object, with the MeshRange option set.
See the Mathematica book: Section 1.9.6.
See also: ContourPlot.
The singularities of this function show up as sharp changes in color.
Evaluate the cell to see the graphic.