learn_connected_graph   Laplacian matrix of a connected graph with
                        Gaussian data Computes the Laplacian matrix of
                        a graph on the basis of an observed data
                        matrix, where we assume the data to be Gaussian
                        distributed.
learn_kcomp_heavytail_graph
                        Laplacian matrix of a k-component graph with
                        heavy-tailed data Computes the Laplacian matrix
                        of a graph on the basis of an observed data
                        matrix, where we assume the data to be
                        Student-t distributed.
learn_regular_heavytail_graph
                        Laplacian matrix of a connected graph with
                        heavy-tailed data Computes the Laplacian matrix
                        of a graph on the basis of an observed data
                        matrix, where we assume the data to be
                        Student-t distributed.
