Asymptotic solutions of the Helmholtz equation: generalised Friedlander-Keller ray expansions of fractional order
Applications of a WKBJ-type `ray ansatz' to obtain asymptotic solutions of the Helmholtz equation in the high{frequency limit are now standard, and underpin the construction of `geometrical optics' ray diagrams in many electromagnetic, acoustic and elastic reflection, transmission and othe...
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| Format: | Article |
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Cambridge University Press
2020
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| Online Access: | https://eprints.nottingham.ac.uk/52013/ |