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Invisibility in billiards is impossible in an infinite number of directions - MaRDI portal

Invisibility in billiards is impossible in an infinite number of directions (Q2329460)

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Invisibility in billiards is impossible in an infinite number of directions
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    Invisibility in billiards is impossible in an infinite number of directions (English)
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    17 October 2019
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    invisibility
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    billiards
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    geometrical optics
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