Proceedings of a workshop held at the Max-Planck-Institute for Mathematics in Bonn, Aug. 3-7, 2009.

Remarks on Wilson loops and Seifert loops in Chern-Simons theory ; Quantum field theory and the volume conjecture ; Computational aspects in Reidemeister torsion and Chern-Simons theories ; Functional integration and abelian link invariants ; Chern-Simons invariants, SO(3) instantons, and mathbb {Z}/2 homology cobordism ; Extending the U(3) Casson invariant to rational homology 3-spheres ; Decomposition of Witten-Reshetikhin-Turaev invariant: Linking pairing and modular forms ; Representations and the colored Jones polynomial of a torus knot ; Eta-invariants and anomalies in /1 Chern-Simons theory ; Delta-groupoids and ideal triangulations ; Invariants of knots and 3-manifolds derived from the equivariant linking pairing ; Chern-Simons theory, the /N expansion, and string theory ; Global Lorentzian geometry from lightlike geodesics: What does an observer in (2+1)-gravity see? ; Spin foam state sums and Chern-Simons theory ; Representations of the Ptolemy groupoid, Johnson homomorphisms, and finite type invariants ; Yang-Mills in two dimensions and Chern-Simons in three ; Intersection pairings on spaces of connections and Chern-Simons theory on Seifert manifolds ; Fermionization and convergent perturbation expansions in Chern-Simons gauge theory ; Analytic continuation of Chern-Simons theory