TGTS Tetrahedral Geometry/Topology Seminar

Sponsored by Elizabethtown College, Franklin and Marshall College,
Lebanon Valley College, and Millersville University

Speakers 2014-2015

12 September   David Lyons, Lebanon Valley College
 3 October     David Johnson, Lehigh University
 7 November    Josh Sabloff, Haverford College
 5 December    Vincent Coll, Lehigh University
 6 February    Lisa Traynor, Bryn Mawr College
 6 March       Zhigang Han, Millersville University
10 April       Barbara Nimershiem, Franklin and Marshall College
TGTS meets at 4:30 p.m. on the first Friday of each month. The public is cordially invited to attend.

Next Talk

    Date: 5 December 2014, 4:30pm
Location: Hempfield High School, Room 213
 Speaker: Vincent Coll, Lehigh University
   Title: The Homotopy Type of Seaweed Lie Algebras

Abstract. An important (but difficult to compute) invariant of a
Lie algebra is its index.  In this talk we will show that for a certain
class of Lie algebras (seaweeds), the index can be computed by counting
the connected components of a remarkable planar graph (called a meander)
associated with the seaweed algebra.  The counting will require an
understanding of the underlying homotopy type of the seaweed.  We will
pay particular attention to Frobenius algebras – those whose index is 0.

Past Seminars

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