Biography:Joel Hass
Joel Hass is an American mathematician and a professor of mathematics and at the University of California, Davis.[1] His work focuses on geometric and topological problems in dimension 3.
Biography
Hass received his Ph.D. from the University of California, Berkeley in 1981 under the supervision of Robion Kirby.[2] He joined the Davis faculty in 1988.[1]
In 2012 he became a fellow of the American Mathematical Society.[3] From 2010 to 2014 he served as the chair of the UC Davis mathematics department.[4]
Research contributions
Hass is known for proving the equal-volume special case of the double bubble conjecture,[5] for proving that the unknotting problem is in NP,[6] and for giving an exponential bound on the number of Reidemeister moves needed to reduce the unknot to a circle.[7]
Selected publications
- Research papers
- "Least area incompressible surfaces in 3-manifolds", Inventiones Mathematicae 71 (3): 609–642, 1983, doi:10.1007/BF02095997, Bibcode: 1983InMat..71..609F, https://deepblue.lib.umich.edu/bitstream/2027.42/46610/1/222_2005_Article_BF02095997.pdf.
- Hass, Joel (1999), "The computational complexity of knot and link problems", Journal of the ACM 46 (2): 185–211, doi:10.1145/301970.301971.
- Hass, Joel; Schlafly, Roger (2000), "Double bubbles minimize", Annals of Mathematics, Second Series 151 (2): 459–515, doi:10.2307/121042, Bibcode: 2000math......3157H.
- Hass, Joel (2001), "The number of Reidemeister moves needed for unknotting", Journal of the American Mathematical Society 14 (2): 399–428, doi:10.1090/S0894-0347-01-00358-7.
- Books
- Adams, Colin; Hass, Joel; Thompson, Abigail (1998), How to Ace Calculus: The Streetwise Guide, New York: W.H. Freeman and Company, ISBN 0-7167-3160-6, https://archive.org/details/howtoacecalculus0000adam.
- How to Ace the Rest of Calculus: The Streetwise Guide, New York: W.H. Freeman and Company, 2001, ISBN 0-7167-4174-1.
2004: Student Solutions Manual, Maurice D. Weir, Joel Hass, George B. Thomas, Frank R Giordano
References
- ↑ 1.0 1.1 Faculty profile and math department contact information, UC Davis, retrieved 2012-07-03.
- ↑ Joel Hass at the Mathematics Genealogy Project
- ↑ List of Fellows of the American Mathematical Society, retrieved 2013-01-19.
- ↑ "Editorial and other Service". https://www.math.ucdavis.edu/~hass/Service/service.html.
- ↑ Hass & Schlafly (2000).
- ↑ Hass, Lagarias & Pippenger (1999).
- ↑ Hass & Lagarias (2001).
External links
 |  |
