= Percy Deift
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Percy Deift developed an exposition of nonlinear steepest descent for <Riemann-Hilbert problems>. His lectures explain how an analytic matrix problem with a prescribed jump across a contour can be transformed to reveal asymptotic behavior. Applications include <orthogonal polynomials>, <integrable systems> and <random matrices>, connecting complex analysis with large-parameter limits.<Riemann-Hilbert Problems by Percy Deift>[Abstract and Lectures 1–2]{ref}
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