tesserahub/sympy — comment on commit dd86ef42b3fb283084d41da4cf7b608c6ecb3eed
File: sympy/stats/crv.py line 244
By tesserahub:

Lambda should work. Maybe we could subclass Function to DistributionDensityFunction and tweak the representation to pdf(x, 1/x**2) or something like that. Plus we can add a function to check if the function is really a pdf :P