Topological Quantum Field Theory Seminar  

03/12/2008, 11:30 — 12:30 — Room P3.10, Mathematics Building
Tim Porter, University of Wales, Bangor, UK

The “Crossed” technology and its applications

In this short series of lectures I will introduce crossed modules and crossed complexes, both algebraically and topologically, will look at their relevance for combinatorial group theory, the theory of syzygies and group cohomology, and then will head for higher order objects namely 2-crossed modules, and related complexes. In the final parts I will introduce some of the constructions of non-Abelian cohomology, sheaves, torsors and Bitorsors and consider the interaction between the crossed gadgetry of the earlier lectures and this area.

References

• The pdf file at the start of the following page, which includes discussions: n-Category Café
• Slightly updated version of the crossed menagerie file: Crossed Menagerie

Schedule:
Lecture 1: Wednesday, 3rd December, 2008, 11h30 - 13
Lecture 2: Wednesday, 3rd December, 2008, 16h30 - 18
Lecture 3: Thursday, 4th December, 2008, 14h30 - 16
Lecture 4: Thursday, 4th December, 2008, 16h30 - 18