Chaikovsky, Mykola [Чайковський, Микола; Čajkovs'kyj], b 2 January 1887 in Berezhany, Galicia, d 7 October 1970 in Lviv. Mathematician and pedagogue, full member of the Shevchenko Scientific Society from 1913; son of Andrii Chaikovsky. A graduate of Vienna University (PH D, 1911), from 1914 to 1918 Chaikovsky worked with the Union for the Liberation of Ukraine in Freistadt, Germany. Subsequently he was a teacher in Galicia; in 1923 he became a professor at the Institute of People's Education in Odesa. He was persecuted in the 1930s but was later appointed a professor first at a pedagogical institute in Kazakhstan, then (after 1956) at Lviv Pedagogical Institute, and (after 1961) at Lviv University. Chaikovsky wrote the manual Kvadratni rivniannia (Quadratic Equations) and the school textbooks Al'gebra (Algebra) and Tryhonometriia (Trigonometry); he also compiled Slovnyk ukraïns'koï matematychnoï terminolohiï (Dictionary of Ukrainian Mathematical Terminology, 1924) and Ukraïns'ka matematychna naukova bibliohrafiia (Ukrainian Scientific Mathematical Bibliography, 1931).
[This article originally appeared in the Encyclopedia of Ukraine, vol. 1 (1984).]