Haine, L.; Vanderstichelen, D.
(Symmetry, Integrability and Geometry: Methods and Applications, 2013)
We show that the (semi-infinite) Ablowitz-Ladik (AL) hierarchy admits a centerless Virasoro algebra of master symmetries in the sense of Fuchssteiner [Progr. Theoret. Phys. 70 (1983), 1508-1522]. An explicit expression for ...