coga                    coga: A package for computing convolution of
                        gamma distributions
dcoga                   Convolution of Gamma Distributions.
dcoga2dim               Convolution of Two Gamma Distributions.
dcoga_approx            Convolution of Gamma distribuitons with
                        Approximation Method
pcoga2dim_diff_shape    Recurrence Identity of Shape Parameter for
                        Distribution Function of coga2dim
