Asymptotic solutions of the Helmholtz equation: Generalised Friedlander–Keller ray expansions of fractional order
(2018)
Journal Article
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 e... Read More about Asymptotic solutions of the Helmholtz equation: Generalised Friedlander–Keller ray expansions of fractional order.