News

The top 6 jobs in the Wall Street Journal's list of best and worst jobs in the United States are: mathematician, actuary, statistician, biologist, software engineer, and computer systems analyst. For 5 out of 6 top positions, the natural preparation begins with a major in the Department of Mathematics and Computer Science.

The full article can be found on the Wall Street Journal website for the original article.

The department is excited to welcome new faculty members Ken Ono and Valerie Summet. Ken Ono joins us as Asa Griggs Candler Professor of Mathematics. This fall, he is teaching a graduate course in number theory. Valerie Summet is a computer scientist specializing in Human-Computer Interaction; she is teaching computer science with business applications and a freshman seminar in robotics.

Saturday, May 15, 2010
Math & Science Center
Emory University
Atlanta, GA

East Coast Computer Algebra Day (ECCAD) is an informal meeting for those active or interested in computer algebra. It provides opportunities to learn and to share new results and work in progress. Researchers, teachers, students, and users of computer algebra are all welcome!

Registration begins at 8:00 a.m. in the second floor atrium

For more information, please visit http://mathcs.emory.edu/eccad2010/

Rock climber takes on surfer's theory


The “exceptionally simple theory of everything,” proposed by a surfing physicist in 2007, does not hold water, says Emory mathematician Skip Garibaldi.

Garibaldi, a rock climber in his spare time, did the math to disprove the theory, which involves a mysterious structure known as E8. The resulting paper, co-authored by physicist Jacques Distler of the University of Texas, will appear in an upcoming issue of Communications in Mathematical Physics.

“The beautiful thing about math and physics is that it is not subjective,” Garibaldi says. “I wanted a peer-reviewed paper published, so that the scientific literature provides an accurate state of affairs, to help clear up confusion among the lay public on this topic.”

In November of 2007, physicist Garret Lisi published an online paper entitled “An Exceptionally Simple Theory of Everything.” Lisi spent much of his time surfing in Hawaii, adding an alluring bit of color to the story surrounding the theory. Although his paper was not peer-reviewed, and Lisi himself told the Daily Telegraph that the theory was still in development and he gave a "low" likelihood to the prediction, the idea was widely reported in the media, under attention-grabbing headlines like “Surfer dude stuns physicists with theory of everything.”

Garibaldi was among the skeptics when the theory hit the news. So was Distler, a particle physicist, who wrote about problems he saw with Lisi’s idea on his blog. Distler’s posting inspired Garibaldi to think about the issue more, eventually leading to their collaboration.

Lisi’s paper centered on the elegant mathematical structure known as E8, which also appears in string theory. First identified in 1887, E8 has 248 dimensions and cannot be seen, or even drawn, in its complete form.E8-inspired graph. Credit: Wikimedia Commons, J. G. Moxness, an emulation of a hand-drawn original by Peter McMullen.

The enigmatic E8 is the largest and most complicated of the five exceptional Lie groups, and contains four subgroups that are related to the four fundamental forces of nature: the electromagnetic force; the strong force (which binds quarks); the weak force (which controls radioactive decay); and the gravitational force.

In a nutshell, Lisi proposed that E8 is the unifying force for all the forces of the universe.

“That would be great if it were true, because I love E8,” Garibaldi says. “But the problem is, it doesn’t work as he described it in his paper.” As a leading expert on several of the exceptional Lie groups, Garibaldi felt an obligation to help set the record straight.

“A lot of mystery surrounds the Lie groups, but the facts about them should not be distorted,” he says. “These are natural objects that are central to mathematics, so it’s important to have a correct understanding of them.”

Using linear algebra and proving theorems to translate the physics into math, Garibaldi and Distler not only showed that the formulas proposed in Lisi’s paper do not work, they also demonstrated the flaws in a whole class of related theories.

“You can think of E8 as a room, and the four subgroups related to the four fundamental forces of nature as furniture, let’s say chairs,” Garibaldi explains. “It’s pretty easy to see that the room is big enough that you can put all four of the chairs inside it. The problem with ‘the theory of everything’ is that the way it arranges the chairs in the room makes them non-functional.”

He gives the example of one chair inverted and stacked atop another chair.

“I’m tired of answering questions about the ‘theory of everything,’” Garibaldi says. “I’m glad that I will now be able to point to a peer-reviewed scientific article that clearly rebuts this theory. I feel that there are so many great stories in science, there’s no reason to puff up something that doesn’t work.”

click here for the original article

The Department of Mathematics and Computer Science is pleased to announce the 16th annual Evans/Hall Lecture and Award Ceremony on Tuesday, April 27 from 4-5pm in E208, Mathematics and Science Center, with reception following. Our speaker this year will be Elizabeth Housworth of Indiana University.

The Evans/Hall Lecture honors graduate and undergraduate students in the department and recognizes outstanding student accomplishments via the Trevor Evans Award, Deborah Jackson Award, Marshall Hall Award, and Departmental Awards.