Abstract
This paper gives a survey of the theory of group velocity for one-dimensional and three- dimensional, isotropic and anisotropic, homogeneous and inhomogeneous, conservative and dissipative, linear and non-linear, classical and relativistic systems exhibiting wave propagation under free and forced-motion conditions.
An Inaugural Lecture by the President of the Institute of Mathematics and its Applications delivered in King’s College, London, on 25 November, 1964.
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Lighthill, M.J. (1970). Group Velocity. In: Froissart, M. (eds) Hyperbolic Equations and Waves. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-87025-5_14
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DOI: https://doi.org/10.1007/978-3-642-87025-5_14
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