Andrey Leman

{{Short description|Sowjet mathematician (1940–2012)}}

Andrey Andreevich Leman ({{langx|ru|Андрей Андреевич Леман}}, 03.10.1940–05.11.2012) was a Soviet mathematician and computer scientist who is known for the development of the Weisfeiler Leman graph isomorphism test together with Boris Weisfeiler published in 1968.{{cite journal |last1=Weisfeiler |first1=B. Yu. |last2=Leman |first2=A. A. |date=1968 |title=A Reduction of a Graph to a Canonical Form and an Algebra Arising during This Reduction |url=https://www.iti.zcu.cz/wl2018/pdf/wl_paper_translation.pdf |journal=Nauchno-Technicheskaya Informatsia |volume=2 |issue=9 |pages=12–16 |access-date=2023-10-28}} He contributed to the chess computer Kaissa, which was the winner of the world's first chess tournament between computer programs in 1974.{{cite web |url=https://www.chessprogramming.org/Kaissa |title=Kaissa |author= |date=2023-09-24 |access-date=2023-10-29 |quote=Further Authors ... A. Leman}} In his youth he successfully participated in math Olympiads ({{interlanguage link|Московская математическая олимпиада|ru}}) becoming a jury member for the Moscow Mathematical Olympiad{{cite journal |last1=Shen |first1=Alexander |last2=Tabachnikov |first2=Serge |date=December 2022 |title=Nikolay Konstantinov, 01.02.1932–07.03.2021, a Mathematical Educator Par Excellence |journal=Notices of the American Mathematical Society |url=https://community.ams.org/journals/notices/202211/noti2590/noti2590.html?adat=December%202022&trk=2590&galt=none&cat=commentary&pdfissue=202211&pdffile=rnoti-p1933.pdf |volume=69 |issue=11 |pages=1933–1941 |doi=10.1090/noti2590 |s2cid=253454170 |access-date=2023-10-29}}{{rp|1940}} in the 1960s. He also coedited a book for preparation of future olympiad participants.{{cite book |last1=Болтянский |first1=Владимир Григорьевич |last2=Леман |first2=Андрей Александрович |date=1965 |title=Сборник задач московских математических олимпиад |trans-title=Collection of problems of the Moscow Mathematical Olympiads |url=https://math.ru/lib/90 |language=ru |location=Moskva |publisher=Изд-во M. Просвещение}}

He contributed to the first Soviet database INES which was used ubiquitously in the USSR and for which he received the USSR Council of Ministers Prize.{{cite web |url=https://towardsdatascience.com/a-forgotten-story-of-soviet-ai-4af5daaf9cdf |title=A forgotten story of Soviet AI |last1=Sergei |first1=Ivanov |work=Medium |date=2020-04-21 |access-date=2023-10-29 |quote=His contribution to the first Soviet database INES which was used ubiquitously in the country brought him the USSR Council of Ministers Prize.}} In 1990 he emigrated into the US where he continued to work as a software developer. He contributed to the Cuneiform OCR in the 1990s which was used by notable companies such as Oracle, IBM, and Samsung.