Abstract
The Grassmannian model for the Korteweg-de Vries hierarchy is used to describe the translational, Galilean and scaling self-similar solutions of this hierarchy. These solutions are characterized by the string equations appearing in two-dimensional quantum gravity. In particular, the subsets of the Sato Grassmannian corresponding to solutions of the string equations are found. The well known Adler-Moser rational solutions are obtained as well as a three-parameter family of solutions associated with the Painleve II equation.
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