TGTS Tetrahedral Geometry/Topology Seminar

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


On 7 March 2003, Millersville University joined with Elizabethtown and Franklin & Marshall Colleges to launch what was initially called the Triangle Geometry/Topology Seminar, or simply "TGTS". On 9 September 2005, Lebanon Valley College joined the group, and the name was changed to the Tetrahedral Geometry/Topology Seminar, preserving the acronym TGTS. On the first Friday of each month during the academic year, mathematicians specializing in geometry and topology gather for TGTS around a topic of common interest at Hempfield High School in Landisville, Pennsylvania. This past March marked 10 years of TGTS, and to celebrate, the following all-star cast of former TGTS speakers was invited back to speak during the 2013-14 academic year.

Speakers 2013-2014

6 September   Ken Brakke, Susquehanna University
4 October     Herman Gluck, University of Pennsylvania
1 November    John McCleary, Vassar College
6 December    Andrew Hicks, Drexel University
7 February    Paul Melvin, Bryn Mawr College
7 March       Dennis DeTurck, University of Pennsylvania
4 April       David L. Johnson, Lehigh University
2 May 2       Frank Morgan, Williams College
The vertices of the "tetrahedron" in TGTS represent the four participating institutions. TGTS meets at 4:30 p.m. on the first Friday of each month. The public is cordially invited to attend.

TGTS Featured in Lancaster Online October 2013

Next Talk

    Date: 2 May 2014, 4:30pm
Location: Hempfield High School, Room 213
 Speaker: Frank Morgan, Williams College
   Title: Chambers Proves LCD Conjecture


The celebrated isoperimetric theorem says that the round ball minimizes
perimeter for given volume in R^n. The 2004 Log-Convex Density
Conjecture says that the round ball about the origin minimizes weighted
perimeter for given weighted volume in R^n for any log-convex weight. It
was proved just this past year by Gregory Chambers, a Toronto graduate
student, after a decade of progress, some by undergraduates.

Past Seminars

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