Lecture – Henry Segerman

Oklahoma State University
Tuesday, April 18 – 4:30 pm
Room; Physics 130
Title: 3D Shadows: Casting light on the fourth dimension
Abstract: Our brains have evolved in a three-dimensional environment, and so
we are very good at visualising two- and three-dimensional objects. But what
about four-dimensional objects? The best we can really do is to look at
three-dimensional “shadows”. Just as a shadow of a three-dimensional object
squishes it into the two-dimensional plane, we can squish a four-dimensional
shape into three-dimensional space, where we can then make a sculpture of
it. If the four-dimensional object isn’t too complicated and we choose a
good way to squish it, then we can get a very good sense of what it is like.
We will explore the sphere in four-dimensional space, the four-dimensional
polytopes (which are the four-dimensional versions of the three-dimensional
polyhedra), and various 3D printed sculptures, puzzles, and virtual reality
experiences that have come from thinking about these things. I talk about
these topics and much more in my new book, Visualizing Mathematics with 3D
Printing.Note that he will be giving another talk at Geometry/Topology seminar on
April 17 at 3:15pm. Moreover, his book will be available at Duke Gothic
bookstore during his visit to Duke.Please spread the word. For more info on PLUM, visit

Lecture – Francis Su

Speaker: Francis Su, Department of Mathematics, Harvey Mudd College

February 13, 2017 (Monday), Physics 128, 4:30-5:30pm (Tea at 3pm Physics 101)

Title: Voting in Agreeable Societies

Abstract: When does a candidate have the approval of a majority? How does the geometry of the political spectrum influence the outcome? What does mathematics have to say about how people behave? When mathematical objects have a social interpretation, the associated results have social applications. We will show how some classical mathematics can be used to understand voting in “agreeable” societies. This talk also features research with undergraduates.


Data Plus Info Fair

There will be a project fair for Data+ 2017 on Tuesday, January 17th,
4:30-6 pm, in the Ahmadieh Atrium (3rd floor of Gross Hall).

For more information, contact Paul Bendich (bendich@math.duke.edu) or Ashlee Valente (ashlee.valente@duke.edu)

Lecture – Ken Ono

Gems of Ramanujan and their lasting impacts on Mathematics

4:30 Thursday, January 26th    107 Gross Hall

Abstract: Ramanujan’s work has had a truly transformative effect on modern mathematics, and continues to do so as we understand further lines from his letters and notebooks. In this lecture, some of the studies of Ramanujan that are most accessible to the general public will be presented and how Ramanujan’s findings fundamentally changed modern mathematics, and also influenced the lecturer’s work, will be discussed. The speaker is an Associate Producer of the film The Man Who Knew Infinity (starring Dev Patel and Jeremy Irons) about Ramanujan. He will share several clips from the film in the lecture.

Biography: Ken Ono is the Asa Griggs Candler Professor of Mathematics at Emory University. He is considered to be an expert in the theory of integer partitions and modular forms. He has been invited to speak to audiences all over North America, Asia and Europe. His contributions include several monographs and over 150 research and popular articles in number theory, combinatorics and algebra. He received his Ph.D. from UCLA and has received many awards for his research in number theory, including a Guggenheim Fellowship, a Packard Fellowship and a Sloan Fellowship. He was awarded a Presidential Early Career Award for Science and Engineering (PECASE) by Bill Clinton in 2000 and he was named the National Science Foundation’s Distinguished Teaching Scholar in 2005. In addition to being a thesis advisor and postdoctoral mentor, he has also mentored dozens of undergraduates and high school students. He serves as Editor-in-Chief for several journals and is an editor of The Ramanujan Journal. He is also a member of the US National Committee for Mathematics at the National Academy of Science

Field Trip to NCMA

You are welcome to join a trip to the North Carolina Museum of Art on January 21, 2017 to view the Ghissi rejuvenation.  This visit is sponsored by the Duke Department of Mathematics and the Romance Studies Department.


– 10:15 to 10:50 am: Charlotte Caspers leads a tour of the exhibit .
– 11:00 to 11:45 am: David Steel presentation on the background on the Ghissi panel and how the idea of the Reunited show emerged.  General discussion of  Italian medieval and early Renaissance painting.
– 11:50 am to 12:15 pm: Ingrid Daubechies presentation on the virtual aging and rejuvenation of the Ghissi panels
– lunch
– 1:30 to 2:30 pm: Humber lecture Better than any Mystery Novel by Charlotte Caspers
– 2:30 –  reception.

For more information please contact Kathy Peterson <kathy.peterson@duke.edu>