BGWM.covar              Variances and covariances of a multi-type
                        Bienayme - Galton - Watson process
BGWM.covar.estim        Estimation of the covariance matrices of a
                        multi-type Bienayme - Galton - Watson process
BGWM.mean               Means of a multi-type Bienayme - Galton -
                        Watson process
BGWM.mean.estim         Estimation of the mean matrix of a multi-type
                        Bienayme - Galton - Watson process
rBGWM                   Simulating a multi-type Bienayme - Galton -
                        Watson process
