Abstract

In this paper, we studied the double scaling limit of a random unitary matrix ensemble near a singular point where a new cut is emerging from the support of the equilibrium measure. We obtained the asymptotic of the correlation kernel by using the Riemann-Hilbert approach. We have shown that the kernel near the critical point is given by the correlation kernel of a random unitary matrix ensemble with weight e −x 2ν , where ν is a positive integer. This provides a rigorous proof of the previous results in [18], 2006, Eynard, Journal of Statistical Mechanics, 7)

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