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       Janet Talvacchia, Swarthmore College
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: 7 March 2014, 4:30pm
Location: Hempfield High School, Room 213
 Speaker: Dennis DeTurck, University of Pennsylvania
   Title: Linking Integrals in Three-dimensional Geometries


Gauss's classical integral formula for the linking number of two curves
in R^3 is geometrically natural in the sense that it is invariant under
ambient isometries, and there are many proofs of it. We'll look at an
approach that produces geometrically natural linking formulas in other
three-dimensional geometries (and some higher-dimensional cases if time

Past Seminars

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