Before revision:  The contribution here is a classification and interpretation carried out with a set of numerical simulations corresponding to networks trained for AND, OR, XOR tasks, and a Flip Flop , by doing the description of the dynamics.
After revision:  The contribution here is a classification and interpretation carried out with a set of numerical simulations corresponding to networks trained for AND, OR, XOR , and Flip Flop tasks. The patterns in the distribution of the eigenvalues of the recurrent weight matrix ware studied and properly related to the dynamics.