Abstract
These notes are an overview of the Nash-Moser iteration technique for solving PDEs (or other non-linear problems) via linearisation, where the linearised equations admit estimates with a loss of regularity with respect to the source term, coefficients and/or boundary/initial data. We first introduce the abstract setting along with a version of the iteration scheme due to Hörmander (Arch Ration Mech Anal 62(1):1–52, 1976). We then introduce some modifications which allow the scheme to be applied to some characteristic free-boundary problems for hyperbolic conservation laws. We focus on the case of supersonic vortex sheets in 2D as considered by Coulombel and Secchi in Ann Sci Éc Norm Supér (4) 41(1):85–139, 2008.
2010 Mathematics Subject Classification 76N10 (35L65 35L67 35Q35 35R35)
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Acknowledgements
My research is supported by a UK EPSRC grant to the Department of Mathematics at Oxford University. I would like to thank my supervisor, Gui-Qiang G. Chen, for helpful discussions on this problem.
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Stevens, B. (2014). The Nash-Moser Iteration Technique with Application to Characteristic Free-Boundary Problems. In: Chen, GQ., Holden, H., Karlsen, K. (eds) Hyperbolic Conservation Laws and Related Analysis with Applications. Springer Proceedings in Mathematics & Statistics, vol 49. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-39007-4_13
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