Bukreev, Boris [Букреєв, Борис], b 6 September 1859 in Lgov, Kursk gubernia, Russia, d 2 October 1962 in Kyiv. Mathematician, professor at Kyiv University from 1889. Bukreev’s main works deal with the theory of complex functions, differential equations, and geometry, particularly non-Euclidean geometry. His most important books are Kurs prilozhenii differentsial'nogo i integral'nogo ischisleniia k geometrii (A Course on Applications of Differential and Integral Calculus to Geometry, 1900), Vstup do variatsiinoho chyslennia (An Introduction to Variational Calculus, 1934), and Neevklidova planimetriia v analitychnomu vykladi (Non-Euclidean Planimetry in Analytical Terms, 1947).
[This article originally appeared in the Encyclopedia of Ukraine, vol. 1 (1984).]