Joel Hass
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File:Joel Hass.jpg
Joel Hass
Joel Hass is an American mathematician, a professor of mathematics and chair of the mathematics department at the University of California, Davis.[1]
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]
Research contributions
Hass is known for proving the equal-volume special case of the double bubble conjecture,[4] for proving that the unknotting problem is in NP,[5] and for giving an exponential bound on the number of Reidemeister moves needed to reduce the unknot to a circle.[6]
Selected publications
- Research papers
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- Books
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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.
- ↑ Hass & Schlafly (2000).
- ↑ Hass, Lagarias & Pippenger (1999).
- ↑ Hass & Lagarias (2001).
