@article {1999, title = {Enhanced gauge symmetries on elliptic K3}, journal = {Phys.Lett. B452 (1999) 244-250}, number = {SISSA;74/98/EP-FM}, year = {1999}, publisher = {Elsevier}, abstract = {We show that the geometry of K3 surfaces with singularities of type A-D-E contains enough information to reconstruct a copy of the Lie algebra associated to the given Dynkin diagram. We apply this construction to explain the enhancement of symmetry in F and IIA theories compactified on singular K3\\\'s.}, doi = {10.1016/S0370-2693(99)00295-6}, url = {http://hdl.handle.net/1963/3366}, author = {Loriano Bonora and Cesare Reina and Alessandro Zampa} }