Date: 4 November 2016, 4:30pm
Location: Hempfield High School, Room 213
 Speaker: Carl Droms, James Madison University
   Title: Planar Cayley Graphs

   Abstract.  Which groups have Cayley graphs that are planar?
   This question was answered for finite groups in 1896. Infinite groups
   having Cayley graphs that can be embedded in the plane without vertex
   accumulation points (VAPs) are also well-understood.  We will discuss
   one approach to classifying the groups whose Cayley graphs can be
   embedded in the plane, but only with one or more VAPs. As an
   application, we obtain a complete classification of the ones that can
   be embedded with a single VAP.