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### Movie Night: The Proof

For over 350 years, some of the greatest minds of science struggled to prove what was known as Fermat's Last Theorem -- the idea that a certain simple equation had no solutions. Now hear from the man who spent seven years of his life cracking the problem, read the intriguing story of an 18th century woman mathematician who hid her identity in order to work on Fermat's Last Theorem, and demonstrate that a related equation, the Pythagorean Theorem, is true.

Andrew Wiles devoted much of his career to proving Fermat's Last Theorem, a challenge that perplexed the best minds in mathematics for 300 years. In 1993, he made front-page headlines when he announced a proof of the problem, but this was not the end of the story; an error in his calculation jeopardized his life's work. In this interview, Wiles recounts how he came to terms with the mistake, and eventually went on to achieve his life's ambition.

The department will show the movie on Thursday, December 1st at 7:30pm in Albright Auditorium. Refreshments will be provided. Bring your friends!

Posted 23 November 2011

### If Copernicus and Kepler Had Computers: An Introduction to Model-Building and Computational Science

Posted 11 November 2011

### A Mathematical Model of T Cell Exhaustion Caused by HBV/HDV

Posted 4 November 2011

### Mathematical Models of Bone Biochemistry with Applications to the Treatment of Osteoporosis

On Wednesday, October 26th at 4:30pm in Napier 201 the Department of Mathematics and Computer Science will host Dr. David Ross of Rochester Institute of Technology. Dr. Ross is a SIAM Visiting Lecturer and will be giving a talk entitled: "Mathematical Models of Bone Biochemistry with Applications to the Treatment of Osteoporosis".

In humans and other mammals the skeleton is continuously remodeled, that is, dissolved and rebuilt; human bone has an annual turnover rate of about 10 percent. Understanding the biochemical processes of bone remodeling is important to the development of treatments for the disease osteoporosis, which is characterized by low bone mass, and which puts those who have it at risk of bone fractures. Osteoporosis results from an imbalance in the biochemical remodeling process, when resorption-the chemical breakdown of old bone-outstrips the formation of new bone. The most common cause of osteoporosis is age-related hormone change, the reduction of estrogen in women after menopause, and the reduction of testosterone in older men. Roughly 20 percent of women over the age of 50 have osteoporosis.

In this talk Professor Ross will discuss dynamical system models of bone remodeling that are used to simulate bone remodeling and to study the effects of various treatments for the condition. He will focus on the ways in which the dynamical systems capture the important biochemical features of the remodeling process, and he will discuss modeling methodology and the ways in which models are used. (Refreshments will be served beforehand.)

Posted 20 October 2011

### Two-faced: The Cantor set and notions of size

Posted 23 September 2011

### Departing Faculty

Posted 23 August 2011

### Lex Kridler: After Hobart

**Lex Kridler '10**sends some news about what he has been doing since graduating from HWS:

"I started work as a front-end developer (css, html, javascript) at Resource Interactive (www.resource.com) a month after graduating from Hobart. Since starting at RI, I have helped develop websites for clients such as Victoria's Secret Pink, Bush's Beans, Kohl's, Hewlett Packard, Dentyne, Bose, Wendy's, Sherwin-Williams, and others. Currently, I am the only front-end web developer on the Purina Cat Chow site redesign, a new responsibility for me.

"This past January, Resource Interactive was named the fourth best digital agency in the country by AdAge magazine, a leading magazine in the digital agency industry. The day after we found out about our award from AdAge we were greeted at work with waffles and champagne in one of the three kitchens in the Columbus office. I either learn or experience something new every day at RI.

"This past spring I helped coach the Junior Varsity lacrosse team at the high school from which I graduated. It was a nice change of pace to go from work to lacrosse practice...

"Also outside of work, about four months ago I created Fluid Ideation LLC through which I do freelance web development. I have worked with two clients through Fluid Ideation, and I have meetings this week with two new clients. Let me know if you need a website!"

Posted 17 August 2011

### Back to School

Keenan was a double major in Mathematics and Computer Science at Hobart, and he received the department's John Klein Prize for excellence in Computer Science in 2009.

Posted 28 July 2011

### Penrose Mandala

Posted 14 June 2011

### Graph Theory Article Published

*Discrete applied Mathematics*. The article, which is titled "A revision and extension of results on 4-regular, 4-connected, claw-free graphs," corrects a classification of 4-connected, claw-free, well-covered graphs that was published in 1995.

Posted 2 June 2011