Rochester Institute of Technology

16th International Conference on Fibonacci Numbers and Their Applications

July 20-26, 2014 in Rochester, New York

Jeffrey Clark Lagarias is a mathematician and professor at the University of Michigan. He is also a member of the The Fibonacci Association Board

While in high school in 1966, Lagarias studied astronomy at the Summer Science Program.

He completed an S.B. and S.M. in Mathematics at the Massachusetts Institute of Technology in 1972. The title of his thesis was "Evaluation of certain character sums". He was a Putnam Fellow at MIT in 1970. He received his Ph.D. in Mathematics from MIT for his thesis "The 4-part of the class group of a quadratic field", in 1974. His advisor for both his masters and Ph.D was Harold Stark.

In 1975 he joined AT&T Bell Laboratories and eventually became Distinguished Member of Technical Staff. Since 1995, he has been a Technology Consultant at AT&T Research Laboratories. In 2002, he moved to Michigan to work at the University and settle down with his family.

While his recent work has been in theoretical computer science, his original training was in analytic algebraic number theory. He has since worked in many areas, both pure and applied, and considers himself a mathematical generalist. Lagarias discovered an elementary problem that is equivalent to the Riemann hypothesis, namely whether for all n > 0, we have with equality only when n = 1. Here Hn is the nth harmonic number, the sum of the reciprocals of the first positive integers, and σ(n) is the divisor function, the sum of the positive divisors of n. He disproved Keller's conjecture in dimensions at least 10. Lagarias has also done work on the Collatz conjecture and Li's criterion.

In 1987 he received a Lester R. Ford award from the Mathematical Association of America. In 2012 he became a fellow of the American Mathematical Society.

Visit Jeffrey Lagarias' website http://www.math.lsa.umich.edu/~lagarias/

Bio from Wikipedia

The Fibonacci Association

The Fibonacci Quarterly

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