TETRAHEDRAL GEOMETRY/TOPOLOGY SEMINAR

                                       ANNOUNCEMENT

DATE:   Friday, May 2, 2008

LOCATION:       Hempfield High School, Room 213

               (directions at http://www.millersville.edu/~tgts/)

                       followed by dinner at the Iron Hill Brewery.

4:30    TALK:   Thomas Hunter, Swarthmore College

       "Joyal's quasi-categories for beginners"

       André Joyal's theory of quasi-categories gives a setting into which

       both homotopy theory of spaces (as Kan complexes) and the theory of

       categories (as their simplicial nerves) both embed. As such it is a

       natural setting for weakly associative or weakly commutative

       categorified structures--in particular, Lurie uses this theory to

       build his "Derived Algebraic Geometry".  I will give an introduction

       to Joyal's quasi-categories intended for an audience which is not

       expert in simplicial homotopy theory, model theory, or higher category

       theory.