# Weak Lacunae of Electromagnetic Waves in Dilute Plasma

@article{Tsynkov2007WeakLO, title={Weak Lacunae of Electromagnetic Waves in Dilute Plasma}, author={Semyon Tsynkov}, journal={SIAM J. Appl. Math.}, year={2007}, volume={67}, pages={1548-1581} }

The propagation of waves is said to be diffusionless, and the corresponding governing PDE (or system) is said to satisfy Huygens' principle if the waves due to compactly supported sources have sharp aft fronts. The areas of no disturbance behind the aft fronts are called lacunae. Diffusionless propagation of waves is rare, whereas its opposite—diffusive propagation accompanied by aftereffects—is common. Nonetheless, lacunae can still be observed in a number of important applications, including…

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