Steven Lawrence Kleiman (born March 31, 1942) is an American
mathematician.
Professional career
Kleiman is a Professor of Mathematics at the
Massachusetts Institute of Technology. Born in
Boston, he did his undergraduate studies at
MIT. He received his Ph.D. from
Harvard University in 1965, after studying there with
Oscar Zariski and
David Mumford, and joined the MIT faculty in 1969. Kleiman held the prestigious NATO Postdoctoral Fellowship (1966-1967),
Sloan Fellowship (1968), and
Guggenheim Fellowship
Guggenheim Fellowships are grants that have been awarded annually since by the John Simon Guggenheim Memorial Foundation to those "who have demonstrated exceptional capacity for productive scholarship or exceptional creative ability in the ar ...
(1979).
Contributions
Kleiman is known for his work in
algebraic geometry
Algebraic geometry is a branch of mathematics, classically studying zeros of multivariate polynomials. Modern algebraic geometry is based on the use of abstract algebraic techniques, mainly from commutative algebra, for solving geometrical ...
and
commutative algebra. He has made seminal contributions in
motivic cohomology,
moduli theory,
intersection theory and
enumerative geometry. A 2002 study of 891 academic collaborations in enumerative geometry and intersection theory covered by
Mathematical Reviews
''Mathematical Reviews'' is a journal published by the American Mathematical Society (AMS) that contains brief synopses, and in some cases evaluations, of many articles in mathematics, statistics, and theoretical computer science.
The AMS also pu ...
found that he was not only the most prolific author in those areas, but also the one with the most collaborative ties, and the most central author of the field in terms of
closeness centrality; the study's authors proposed to name the collaboration graph of the field in his honor.
Awards and honors
In 1989 the
University of Copenhagen awarded him an honorary doctorate and in May 2002 the
Norwegian Academy of Science and Letters hosted a conference in honor of his 60th birthday and elected him as a foreign member. In 1992 Kleiman was elected foreign member of the
Royal Danish Academy of Sciences and Letters.
In 2012 he became a fellow of the
American Mathematical Society. He was an invited speaker at the International Congress of Mathematics at Nice in 1970.
International Mathematical Union (IMU)
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Selected publications
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See also
*Cone of curves
In mathematics, the cone of curves (sometimes the Kleiman-Mori cone) of an algebraic variety X is a combinatorial invariant of importance to the birational geometry of X.
Definition
Let X be a proper variety. By definition, a (real) ''1-cycle ...
(Kleiman-Mori cone)
*Kleiman's theorem In algebraic geometry, Kleiman's theorem, introduced by , concerns dimension and smoothness of scheme-theoretic intersection after some perturbation of factors in the intersection.
Precisely, it states: given a connected algebraic group ''G'' act ...
References
External links
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{{DEFAULTSORT:Kleiman, Steven L.
1942 births
Living people
20th-century American mathematicians
21st-century American mathematicians
Algebraic geometers
Massachusetts Institute of Technology School of Science faculty
Harvard University alumni
Members of the Norwegian Academy of Science and Letters
Fellows of the American Mathematical Society
Massachusetts Institute of Technology alumni
Mathematicians from Massachusetts