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. 2016 Feb;472(2186):20150658. doi: 10.1098/rspa.2015.0658

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© 2016 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 4. — The scattering of a plane wave ψ=π/4 by a grating with s=1.0, for β=4.0. (a) Real part of the displacement field u. The shadow boundaries for ϕ₀ and ϕ₋₁ are marked using dashed black lines. (b) Comparison of the Wiener–Hopf (dots) and Foldy (solid line) coefficients |A_k|. (Online version in colour.)