Mark Kac
Mathematician (1914-1984) · United States · On the map · Academics · Died at 70
Mark Kac was a Polish-American mathematician. His main interest was probability theory. His question, "Can one hear the shape of a drum?" set off research into spectral geometry, the idea of understanding the extent to which the spectrum allows one to read back the geometry.
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In the end, the answer was generally "No," although certain shapes, such as a circular drum, can be inferred from the spectrum of the Laplacian.