Pólya Plot
A Pólya plot is a plot of the vector field of (ℜ[f(z)], - ℑ[f(z)]) of a complex function f(z). Several examples are shown above. Pólya plots can be created in the Wolfram Language using the following code: PolyaFieldPlot[f_, {x_, xmin_, xmax_}, {y_, ymin_, ymax_}, opts : OptionsPattern[]] := VectorPlot[Evaluate @ {Re[f], -Im[f]}, {x, xmin, xmax}, {y, ymin, ymax}, VectorScale -> {Automatic, Automatic, Log[#5 + 1]&}, opts ]