Nikola Dimitrov Obreshkov () (March 6, 1896 in VarnaAugust 11, 1963 in Sofia) was a prominent Bulgarian mathematician, working in complex analysis. See also Obreschkoff–Ostrowski theorem References European Mathematics Society Newsletter No. 51 (PDF), page 28. Nikola Obrechkoff Bulgarian mathematicians 1896 births 1963 deaths Members of the Bulgarian Academy of Sciences People from Varna, Bulgaria