Mañas Baena, Manuel Enrique2023-06-202023-06-201993-11-110370-269310.1016/0370-2693(93)91005-8https://hdl.handle.net/20.500.14352/59706©Elsevier Science BV.The string equation appearing in the double scaling limit of the Hermitian one–matrix model, which corresponds to a Galilean self–similar condition for the KdV hierarchy, is reformulated as a scaling self–similar condition for the Ur–KdV hierarchy. A non– scaling limit analysis of the one–matrix model has led to the complexified NLS hierarchy and a string equation. We show that this corresponds to the Galilean self– similarity condition for the AKNS hierarchy and also its equivalence to a scaling self– similar condition for the Heisenberg ferromagnet hierarchy.engAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/journal articlehttp://dx.doi.org/10.1016/0370-2693(93)91005-8http://www.sciencedirect.comhttp://arxiv.org/abs/hep-th/9307020open access51-732-Dimensional quantum-GravityFísica-Modelos matemáticosFísica matemática