Person: Voronoy, Georgy Fedoseevich
Georgy Voronoy was a Ukranian mathematician best known for the Voronoi diagram which is a partitioning of a plane into regions based on distance to a finite set of points.
Mathematical Profile (Excerpt):
 Georgy completed his high school education at the gymnasium in Priluki, graduating in 1885.
 Voronoy did not have a particularly easy time at university.
 Voronoy had to tutor mathematics, often for rather small fees, and, taking such work very seriously and putting much effort into it, he found giving lessons exhausting.
 After graduating from St Petersburg in 1889, writing a dissertation on Bernoulli numbers, Voronoy decided to remain there and work for his teaching qualification.
 Voronoy lectured at Warsaw University, being appointed professor of pure mathematics there in 1894.
 Voronoy then discussed Jacobi's generalisation, after which he went on to look at generalisations due to Poincaré and Hurwitz.
 Both Voronoy's master's thesis and his doctoral thesis were of such high quality that they were awarded the Bunyakovsky prize by the St Petersburg Academy of Sciences.
 Later Voronoy worked on the theory of numbers, in particular he worked on algebraic numbers and the geometry of numbers.
 In considering tessellations, Voronoy introduced what are today called Voronoi diagrams or Voronoi tessellations.
 In 1904 Voronoy attended the Third International Congress of Mathematicians at Heidelberg.
Born 28 April 1868, Zhuravka, Poltava guberniya, Russia (now Ukraine). Died 20 November 1908, Warsaw, Russian Empire (now Poland).
View full biography at MacTutor
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References
Adapted from other CC BYSA 4.0 Sources:
 O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive