Larry Washington

Lawrence Clinton Washington (born 1951, Vermont) is an American mathematician at the University of Maryland who specializes in number theory.

Biography

Washington studied at Johns Hopkins University, where in 1971 he received his B.A. and master's degree. In 1974 he earned his PhD at Princeton University under Kenkichi Iwasawa with thesis ''Class numbers and $Z_p$ extensions''. He then became an assistant professor at Stanford University and from 1977 at the University of Maryland, where he became in 1981 an associate professor and in 1986 a professor. He held visiting positions at several institutions, including IHES (1980/81), Max-Planck-Institut für Mathematik (1984), the Institute for Advanced Study (1996), and MSRI (1986/87), as well as at the University of Perugia, Nankai University and the State University of Campinas. In 1979–1981 he was a Sloan Fellow.

Recognition

He was named to the 2023 class of Fellows of the American Mathematical Society, "for contributions to number theory, especially cyclotomic fields, and for mentoring at all levels".

Research

Washington wrote a standard work on cyclotomic fields. He also worked on p-adic L-functions. He wrote a treatise with Allan Adler on their discovery of a connection between higher-dimensional analogues of magic squares and p-adic L-functions. Washington has done important work on Iwasawa theory, Cohen- Lenstra heuristics, and elliptic curves and their applications to cryptography.

In Iwasawa theory he proved with Bruce Ferrero in 1979 a conjecture of Kenkichi Iwasawa, that the $\mu$-invariant vanishes for cyclotomic Z_''p''-extensions of abelian number fields ( Theorem of Ferrero-Washington).Ferrero, Washington ''The Iwasawa invariant μ_p vanishes for abelian number fields'', Annals of Mathematics, vol. 109, 1979, pp. 377–395. Another proof was provided by W. Sinnott, Inventiones Mathematicae, vol. 75, 1984, 273.

More recently, Washington has published on arithmetic dynamics, sums of powers of primes, and Iwasawa invariants of non-cyclotomic Z_''p'' extensions

Selected works

''Introduction to Cyclotomic Fields''
Graduate Texts in Mathematics, Springer, 1982, 2nd edn. 1996
* ''Galois Cohomology'' in Cornell, Silverman, Stevens (eds.): ''Modular forms and Fermat's Last Theorem'', Springer, 1997

''Elliptic Curves: Number theory and cryptography''
CRC Press, 2003, 2nd edn. 2008
* with James Kraft: ''An Introduction to Number Theory with Cryptography'', CRC Press, 2003, 2nd edn.
* with Wade Trappe: ''Introduction to Cryptography and Coding Theory'', Prentice-Hall, 2002, 2nd edn. 2005

Sources

Joseph Oesterlé ''Travaux de Ferrero et Washington sur le nombre de classes d'idéaux des corps cyclotomiques'', Séminaire Bourbaki, Nr. 535, 1978/79Lawrence C. Washington, Curriculum Vita

References

External links

Homepage
*

{{DEFAULTSORT:Washington, Lawrence C.
1951 births
Living people
20th-century American mathematicians
21st-century American mathematicians
Modern cryptographers
Number theorists
Johns Hopkins University alumni
Princeton University alumni
University of Maryland, College Park faculty
Fellows of the American Mathematical Society