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 Emanuil  Dimitrov  Ivanov
(30. I.1857 - 24.VII.1925)

A member of the Bulgarian literary association (later Bulgarian Academy of Science) from 1900. He was born in Svishtov. Founder of the maths and physics departments, the chair of high analysis and a rector at the Sofia university. Ivanov was one of the founder of the Maths and Physics Association in Bulgaria (1898), its chairman for many years and an editor of the magazine. An author of reports on maths methodic and science from the sphere of numbers'theory. His surveys on the tetranions - hypercomplex numbers with 4 units are remarkable. He died in Kyustendil.