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Boris Delaunay

Soviet mathematician (1890–1980).

Born March 15th, 1890 in Saint Petersburg. [ref]

Died July 17th, 1980 at 90 years old in Moscow.

Occupations
mathematician, mountaineer, university teacher
Wikipedia

Today you are you! That is truer than true! There is no one alive who is you-er than you! Dr. Seuss