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Anomaly Inflow and the -Invariant
Edward Witten, Kazuya Yonekura
Perturbative fermion anomalies in spacetime dimension have a well-known relation to Chern-Simons functions in dimension . This relationship is manifested in a beautiful…
JT Gravity and the Ensembles of Random Matrix Theory
Douglas Stanford, Edward Witten
We generalize the recently discovered relationship between JT gravity and double-scaled random matrix theory to the case that the boundary theory may have time-reversal symmetry an…
A Note On Some Minimally Supersymmetric Models In Two Dimensions
D. Gaiotto, T. Johnson-Freyd, E. Witten
We explore the dynamics of a simple class of two-dimensional models with supersymmetry, namely sigma-models with target and the minimal possible set of fields. For an…
Light Rays, Singularities, and All That
Edward Witten
This article is an introduction to causal properties of General Relativity. Topics include the Raychaudhuri equation, singularity theorems of Penrose and Hawking, the black hole ar…