Jeffrey Lagarias

Jeffrey Clark Lagarias (born November 16, 1949, in Pittsburgh, Pennsylvania, United States) is a mathematician and professor at the University of Michigan.[2] 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.[citation needed] 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.Lagarias has also done work on the Collatz conjecture and Li's criterion and has written several highly cited papers in symbolic computation with Dave Bayer.[citation needed] Lagarias received in 1986 a Lester R. Ford award from the Mathematical Association of America[5] and again in 2007.
PittsburghPennsylvaniamathematicianUniversity of MichiganastronomySummer Science ProgramMassachusetts Institute of TechnologyPutnam FellowHarold StarkAT&T Bell Laboratoriesalgebraic number theorytheoretical computer scienceRiemann hypothesisharmonic numberdivisor functionKeller's conjectureCollatz conjectureLi's criterionDave BayerLester R. FordMathematical Association of AmericaAmerican Mathematical SocietyNational Academy of SciencesMathematics Genealogy Project