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Israïl (Israel) Moiseevich Gelfand (Russian: Израиль Моисеевич Гельфанд) (born on September 2, 1913) is a mathematician.

Contents 1 Biography 2 Work 3 Influence outside of math 4 Honors and Awards 5 External links

[edit] Biography

He was born into a Jewish family in Okny, Kherson region in Ukraine, then part of the Russian Empire.

He studied at the Moscow State University where his advisor was Andrei Kolmogorov.

He is considered by many to be the founder and leading figure of the Soviet school of mathematics, and has exerted a tremendous influence on the field both through his own works and through those of his students. He ran a famous seminar at Moscow State University. In 1990 he emigrated to the USA and took up a Distinguished Visiting Professorship at Rutgers University in New Jersey.

The mathematician Sergiu Gelfand is his son.

[edit] Work

He is known for many developments including:

• the Gelfand representation in Banach algebra theory;
• the Gelfand–Naimark theorem;
• the Gelfand-Naimark-Segal construction
• the representation theory of the complex classical Lie groups;
• contributions to distribution theory and measures on infinite-dimensional spaces;
• the first observation of the connection of automorphic forms with representations (with Sergei Fomin);
• conjectures about the index theorem;
• Ordinary differential equations (Gelfand-Levitan theory);
• work on calculus of variations and soliton theory (Gelfand-Dikii equations);
• contributions to the philosophy of cusp forms;
• Gelfand-Fuks cohomology of foliations;
• Gelfand-Kirillov dimension;
• integral geometry;
• combinatorial definition of the Pontryagin class;
• Coxeter functors;
• generalised hypergeometric series;

and many other results, particularly in the representation theory for the classical groups.

[edit] Influence outside of math

The Gelfand-Tsetlin basis (also in the common spelling Zetlin) is a widely-used tool in theoretical physics.

For a long time he took an interest in cell biology.

He's worked extensively in mathematics education, particularly with correspondence education. He was awarded a MacArthur fellowship for this work.

[edit] Honors and Awards

He was awarded the Order of Lenin three times for his research and in 1977 was created a a Foreign Member of the Royal Society. He won the Wolf Prize in 1978. He held the presidency of the Moscow Mathematical Society between 1968 and 1970, and has been elected an honorary member of the U.S. National Academy of Science, the American Academy of Arts and Sciences, the Royal Irish Academy, the American Mathematical Society and the London Mathematical Society. He holds several honorary degrees.

[edit] External links

• Israel Gelfand at the Mathematics Genealogy Project
• O'Connor, John J., and Edmund F. Robertson. "Israel Gelfand". MacTutor History of Mathematics archive.
• List of publications.de:Israel Gelfand

fr:Israel Gelfand ja:イズライル・ゲルファント zh:盖尔芳特