Geodesic
Asymptotics of optimal control in the problem of harmonic wave scattering by an obstacle
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 47 (2007) no. 9, pp. 1602-1608 Cet article a éte moissonné depuis la source Math-Net.Ru

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Optimal impedance control for the Helmholtz equation in an unbounded domain is studied. Asymptotics of the optimal control with respect to a regularization parameter are constructed. 
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A. S. Savenkova. Asymptotics of optimal control in the problem of harmonic wave scattering by an obstacle. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 47 (2007) no. 9, pp. 1602-1608. http://geodesic.mathdoc.fr/item/ZVMMF_2007_47_9_a13/

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