This function returns a random variate from the Pareto distribution of order a. The distribution function is,
for \(x \geq b\).
This function computes the probability density \(p(x)\) at \(x\) for a Pareto distribution with exponent a and scale b, using the formula given above.
These functions compute the cumulative distribution functions \(P(x), Q(x)\) and their inverses for the Pareto distribution with exponent a and scale b.