# The KdV hierarchy: universality and a Painlevé transcendent

@article{Claeys2011TheKH, title={The KdV hierarchy: universality and a Painlev{\'e} transcendent}, author={Tom Claeys and Tamara Grava}, journal={International Mathematics Research Notices}, year={2011}, volume={2012}, pages={5063-5099} }

We study the Cauchy problem for the Korteweg-de Vries (KdV) hierarchy in the small dispersion limit where $\e\to 0$. For negative analytic initial data with a single negative hump, we prove that for small times, the solution is approximated by the solution to the hyperbolic transport equation which corresponds to $\e=0$. Near the time of gradient catastrophe for the transport equation, we show that the solution to the KdV hierarchy is approximated by a particular Painlev\'e transcendent. This…

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