Date  Speaker  Title 
Oct. 10  Mary Sandoval (Trinity College) 

Oct. 5, 4pm  Alexandre Girouard (Universite Laval) 

Sept. 26  Petra BonfireTaylor (Dartmouth College, Thayer Engineering School) 

Sept. 20, 9am  Moon Duchin (Tufts University) 
Discrete geometry, with applications to voting 
Abstracts
September 20, 2017: Moon Duchin "Discrete geometry, with applications to voting"
Abstract: Several specialties in mathematics and computer science are built around discrete or metricspace generalizations of classical geometry of manifolds. In math, comparison geometry (with roots in ideas of Alexandrov and others) has taken off in geometric group theory, proving very fruitful for the largescale study of discrete groups. In CS, there's a burgeoning field of discrete differential geometry, which looks at geometry of meshes and builds up theory of curvature, Laplacians, and so on. I'll survey some ideas in these areas and will explain possible applications to electoral redistricting.