Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Yuri L. Ershov or Yershov (Юрий Леонидович Ершов, born January 5, 1940) is a Soviet and Russian mathematician. He was born in Novosibirsk. Apart from being a mathematician, Ershov was a member of the communist party and had different distinguished administrative duties in Novosibirsk State University. Ershov has been accused of antisemitic practices, and his visit to the U.S. in 1980 drew public protests by a number of U.S. mathematicians. Ershov himself denied the validity of these accusations. Yuri L. Ershov is Editor in Chief of the Siberian Mathematics Journal and an editor of the Russian journal Algebra i Logika (Algebra and Logic). His Ph.D. thesis, On Decidabiliity of Elementary Theories, advisor Anatolij Mal'tsev, was accepted by the Novosibirsk State University in 1963.

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