Hendrik Lenstra
Template:Short description Script error: No such module "Template wrapper".Script error: No such module "Check for clobbered parameters". Hendrik Willem Lenstra Jr. (born 16 April 1949, Zaandam) is a Dutch mathematician.
Biography
Lenstra received his doctorate from the University of Amsterdam in 1977 and became a professor there in 1978. In 1987, he was appointed to the faculty of the University of California, Berkeley; starting in 1998, he divided his time between Berkeley and the University of Leiden, until 2003, when he retired from Berkeley to take a full-time position at Leiden.[1]
Three of his brothers, Arjen Lenstra, Andries Lenstra, and Jan Karel Lenstra, are also mathematicians. Jan Karel Lenstra is the former director of the Netherlands Centrum Wiskunde & Informatica (CWI). Hendrik Lenstra was the Chairman of the Program Committee of the International Congress of Mathematicians in 2010.[2]
Scientific contributions
Lenstra has worked principally in computational number theory. He is well known for:
- Co-discovering of the Lenstra–Lenstra–Lovász lattice basis reduction algorithm (in 1982);
- Developing an polynomial-time algorithm for solving a feasibility integer programming problem when the number of variables is fixed (in 1983);[3]
- Discovering the elliptic curve factorization method (in 1987);[4]
- Computing all solutions to the inverse Fermat equation (in 1992);[5]
- The Cohen-Lenstra heuristics - a set of precise conjectures about the structure of class groups of quadratic fields.[6]
Awards and honors
In 1984, Lenstra became a member of the Royal Netherlands Academy of Arts and Sciences.[7] He won the Fulkerson Prize in 1985 for his research using the geometry of numbers to solve integer programs with few variables in time polynomial in the number of constraints.[8] He was awarded the Spinoza Prize in 1998,[9] and on 24 April 2009 he was made a Knight of the Order of the Netherlands Lion. In 2009, he was awarded a Gauss Lecture by the German Mathematical Society. In 2012, he became a fellow of the American Mathematical Society.[10]
Publications
- Euclidean Number Fields. Parts 1-3, Mathematical Intelligencer 1980
- with A. K. Lenstra: Algorithms in Number Theory. pp. 673–716, In Jan van Leeuwen (ed.): Handbook of Theoretical Computer Science, Vol. A: Algorithms and Complexity. Elsevier and MIT Press 1990, Template:ISBN, Template:ISBN.
- Algorithms in Algebraic Number Theory. Bulletin of the AMS, vol. 26, 1992, pp. 211–244.
- Primality testing algorithms. Séminaire Bourbaki 1981.
- with Peter Stevenhagen: Artin reciprocity and Mersenne Primes. Nieuw Archief for Wiskunde 2000.
- with Peter Stevenhagen: Chebotarev and his density theorem. Mathematical Intelligencer 1992 (Online at Lenstra's Homepage).
- Profinite Fibonacci Numbers, December 2005, PDF
See also
References
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- ↑ Prof. dr. H.W. Lenstra, 1949 - at the University of Amsterdam Album Academicum website
- ↑ ICM – International Congress of Mathematicians
- ↑ H.W. Lenstra, "Integer programming with a fixed number of variables", Mathematics of operations research, Vol 8, No 8, November 1983
- ↑ Factoring integers with elliptic curves. Annals of Mathematics, vol. 126, 1987, pp. 649–673
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- ↑ Past winners of the Fulkerson Prize, retrieved 2015-07-18.
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- ↑ List of Fellows of the American Mathematical Society, retrieved 2013-01-27.
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External links
- Script error: No such module "citation/CS1".
- Script error: No such module "citation/CS1"., Homepage at the Leiden Mathematisch Instituut
- Template:PAGENAMEBASE at the Mathematics Genealogy ProjectTemplate:EditAtWikidata
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- Pages with script errors
- 1949 births
- Living people
- 20th-century Dutch mathematicians
- 21st-century Dutch mathematicians
- Members of the Royal Netherlands Academy of Arts and Sciences
- Number theorists
- Spinoza Prize winners
- University of Amsterdam alumni
- Academic staff of the University of Amsterdam
- Academic staff of Leiden University
- University of California, Berkeley College of Letters and Science faculty
- Fellows of the American Mathematical Society
- Dutch expatriates in the United States
- People from Zaanstad