A limitation of GCNs is that they do not allow multidimensional edge features e u v {\displaystyle \mathbf {e} _{uv}} .[5] It is however possible to associate scalar weights w u v {\displaystyle w_{uv}} to each edge by imposing A u v = w u v {\displaystyle A_{uv}=w_{uv}} , i.e., by setting each nonzero entry in the adjacency matrix equal to the weight of the corresponding edge.