Lowell Schoenfeld

Lowell Schoenfeld
File:Lowell Schoenfeld.jpg
Born	(1920-04-01)April 1, 1920
Died
Nationality	United States
Fields	Mathematics
Alma mater	University of Pennsylvania
Doctoral advisor	Hans Rademacher
Doctoral students	John Rowland Samuel Lawn

Lowell Schoenfeld (April 1, 1920 – February 6, 2002) was an American mathematician known for his work in analytic number theory. He received his Ph.D. in 1944 from University of Pennsylvania under the direction of Hans Rademacher. He is known for obtaining the following results in 1976, assuming the Riemann hypothesis:

$|\pi(x)-{\rm li}(x)|\le\frac{\sqrt x\,\ln x}{8\pi}$

for all x ≥ 2657, based on the prime-counting function π(x) and the logarithmic integral function li(x), and

$|\psi(x)-x|\le\frac{\sqrt x\,\ln^2 x}{8\pi}$

for all x ≥ 73.2, based on the second Chebyshev function ψ(x).

External links

• Lowell Schoenfeld at the Mathematics Genealogy Project