Joel Hass
Joel Hass is an American mathematician, a professor of mathematics and chair of the mathematics department at the University of California, Davis.
Biography
Hass received his Ph.D. from the University of California, Berkeley in 1981 under the supervision of Robion Kirby. He joined the Davis faculty in 1988.
In 2012 he became a fellow of the American Mathematical Society.
Research contributions
Hass is known for proving the equal-volume special case of the double bubble conjecture, for proving that the unknotting problem is in NP, and for giving an exponential bound on the number of Reidemeister moves needed to reduce the unknot to a circle.
Selected publications
Podcasts:
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by Daniel Lanois
Jolie Louise
by: Daniel LanoisMa jolie, how do you do?
Mon nom est Jean-Guy Thibault-Leroux
I come from east of Gatineau
My name is Jean-Guy, ma jolie
J'ai une maison a Lafontaine
Where we can live, if you marry me
Une belle maison a Lafontaine
Where we will live, you and me
Oh Louise, ma jolie Louise
Tous les matins au soleil
I will work 'til work is done
Tous les matins au soleil
I did work 'til work was done
And one day, the foreman said
"Jean-Guy, we must let you go"
Et pis mon nom, y est pas bon
At the mill anymore
Oh Louise, I'm losing my head, I'm losing my head
My kids are small, 4 and 3
Et la bouteille, she's mon ami
I drink the rum 'tilI I can't see
It hides the shame, Louise does not see
Carousel turns in my head
And I can't hide, oh no, no, no, no
And the rage turned in my head
And Louise, I struck her down, down on the ground
I'm losing my mind, I'm losing my mind
En Septembre '63
Kids are gone, and so is Louise
Ontario, they did go
Near la ville de Toronto
Now my tears, they roll down
Tous les jours
And I remember the days
And the promises that we made