John Mackey (mathematician)
- John Mackey (mathematician)
John Mackey is an American mathematician. He received his Ph.D. in mathematics from the University of Hawaii at Manoa in 1994 and is currently a lecturer and assistant department head at Carnegie Mellon University.
His main contributions to mathematics have been his discoveries of many new bounds for Ramsey numbers. In 1994 he discovered new bounds for R(6, 6) through R(10, 10), and proved that 41 ≤ R(5, 5) ≤ 55, at the time a great feat. He later reduced the upper bound to 50. To this day he believes R(5, 5) = 43.
His Erdős number is 3.
He can be traced back through the Mathematics Genealogy Project to Carl Friedrich Gauss, Ferdinand Georg Frobenius, Karl Weierstrass, and other famous mathematicians.
External links
* [http://www.math.cmu.edu/people/fac/mackey.html John Mackey] at the Carnegie Mellon Department of Mathematical Sciences page.
* [http://mathworld.wolfram.com/RamseyNumber.html Ramsey Numbers] at Mathworld.
* [http://genealogy.math.ndsu.nodak.edu/html/id.phtml?id=40557 John Mackey's Genealogy] at The Mathematics Genealogy Project.
John Mackey is also an individual that is approximately 76 years of age. However he was a chemistry teacher not a mathemetician.
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