Vissarion Alekseyev
Vissarion Grigorievich Alekseyev was a Russian mathematician. 1909-1914 and 1917–1918 he was the rector of Tartu University.
He was graduated from Moscow University. Since 1891 he worked at the Imperial University of Dorpat.
In 1920 he moved permanently to Estonia.
He died in 1943 in Poland.