Cursos de Verão em Geometria 

08/07/2002, 09:00 — 10:00 — Anfiteatro Ea2, Torre Norte (Electricidade)
Ieke Moerdijk, Utrecht

Non-abelian Cohomology and Gerbes (I)

The purpose of these lectures is to introduce the audience to the topological concepts of stack, gerbe and bundle gerbe, and the non-abelian cohomology classes to which they give rise.

---

Sheaves, torsors and non-abelian cohomology in degree 1.

References

• L. Breen, On the classification of 2-gerbes and 2-stacks, Asterisque 225, (1994).
• J. Giraud, Cohomologie nonabelienne, Springer-Verlag, 1971.
• I. Moerdijk, On the classification of regular Lie groupoids, preprint math.DG/0203099.
• M. Murray, Bundle gerbes, J. London Math. Soc. 54 (1996).