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Displaying similar documents to “Crossing and experimental ππ S and P waves”

Invisible obstacles

A. G. Ramm (2007)

Annales Polonici Mathematici

Similarity:

It is proved that one can choose a control function on an arbitrarilly small open subset of the boundary of an obstacle so that the total radiation from this obstacle for a fixed direction of the incident plane wave and for a fixed wave number will be as small as one wishes. The obstacle is called "invisible" in this case.