Abstract
In these lectures we outline the known results concerning existence, uniqueness, and regularity for the Cauchy problem for harmonic maps from (1 + m)-dimensional Minkowski space into a Riemannian target manifold, also known as α-models or wave maps. In particular, we mark the limits of the classical theory in high dimensions and trace recent developments in dimension m = 2, substantiating the conjecture that in this “conformai” case the Cauchy problem is well-posed in the energy space.
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Struwe, M. (1997). Wave maps. In: Baker, G., Freire, A. (eds) Nonlinear Partial Differential Equations in Geometry and Physics. Progress in Nonlinear Differential Equations and Their Applications, vol 29. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8895-0_4
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DOI: https://doi.org/10.1007/978-3-0348-8895-0_4
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