### NSF Postdoctoral Fellowship:

**2009, Stacy Hoehn**, who will receive her Ph.D. in Mathematics this semester, has been awarded a National Science Foundation (NSF) Postdoctoral Fellowship to study at Vanderbilt University for two or three years. She will continue her research in geometric topology, investigating mathematical objects, called high-dimensional manifolds, that do not have boundaries.

Hoehn became interested in topology at Xavier University, where she earned a B.S. in Mathematics and Computer Science in 2004. At Notre Dame, where she earned an M.S. in Mathematics in 2006, she was advised by Prof. Bruce Williams. Her research has included Siebenmannâ€™s end theorem, surgery theory, algebraic K-theory and automorphisms of manifolds.

She received a three-year Graduate Research Fellowship from the NSF in 2005, which among other things supported a trip to Germany to give a presentation on microbundles at a workshop on high-dimensional manifolds and to attend a conference on surgery theory in Scotland. She met Bruce Hughes, who will be her mentor at Vanderbilt, at a conference a few years ago.

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