 Similarly, the discussion assumes that truncation is to a semi-open interval "y" ∈ ("a,b"] but other possibilities can be handled straightforwardly.Suppose we have a random variable, formula_1 that is distributed according to some probability density function, formula_2, with cumulative distribution function formula_3 both of which have infinite support.Suppose we wish to know the probability density of the random variable after restricting the support to be between two constants so that the support, formula_4.