Boris Nikolaevich Delaunay or Delone (Russian: Бори́с Никола́евич Делоне́; March 15, 1890 – July 17, 1980) was one of the first Russian mountain climbers and a Soviet/Russian mathematician, and the father of physicist Nikolai Borisovich Delone. The spelling Delone is a straightforward transliteration from Cyrillic he often used in recent publications, while Delaunay is the French version he used in the early French and German publications. Boris Delone got his surname from his ancestor French… Read more...

Robert Delaunay (12 April 1885 – 25 October 1941) was a French artist who, with his wife Sonia Delaunay and others, cofounded the Orphism art movement, noted for its use of strong colours and geometric shapes. His later works were more abstract, reminiscent of Paul Klee. His key influence related to bold use of colour, and a clear love of experimentation of both depth and tone. Read more...