**Ruth Charney, Brandeis University**

**Tuesday, October 14, 2008**

**Abstract: **Children build models with 3-dimensional cubes. Mathematicians build them with higher dimensional cubes. Many physical systems can be represented by geometric models based on cubes. Using an example from robotics, we will investigate how such models are constructed and what can we learn from their strange, but beautiful geometry.

**Biography: **Ruth Charney is Professor of Mathematics at Brandeis University. She received her undergraduate degree from Brandeis and her PhD from Princeton. She taught at Berkeley, Yale, and Ohio State University before returning to her alma mater in 2003. She currently serves as Chair of her department and as a Vice President of the American Mathematical Society. She was never sure whether she was a topologist or an algebraist, and is now happily immersed in geometric group theory, a combination of the two.

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