Eugenio Beltrami
In the early years, in his role as sole editor of the "Annali", Tortolini corresponded with all the major scientists of his day. Aside from Betti, Tortolini was one of the few Italian contemporaries to tap into foreign journals and by doing so established a rapport with the finest minds of his time including Carl Friedrich Gauss, Joseph Louis Lagrange, Cauchy, Riemann, Luigi Bianchi, Tullio Levi-Civita, Charles Hermite, Niels Abel, Peter Gustav Lejeune Dirichlet, Sir William Thomson, Augustus De Morgan, J. J. Sylvester, Gabriel Lamé, and Eugenio Beltrami. His contributions to mathematical research — over one hundred papers — have yet to be assessed on their own merits.