67 citations · 204 across the 35 of their papers we have counts for
36 papers
CFT characters from localization
Lorenz Eberhardt, Duarte Fragoso, Hessel Posthuma
We explain a general procedure to compute characters of chiral algebras of 2d (S)CFTs geometrically from their coadjoint orbits, in analogy with the coadjoint orbit method for fini…
Higher Lefschetz formulas on Γ-proper manifolds
Paolo Piazza, Hessel Posthuma, Yanli Song +1
Let be a finitely generated discrete group acting properly and cocompactly on a smooth manifold M. By employing heat-kernel techniques we prove a geometric formula for the pair…
Global Gauge Symmetries and Spatial Asymptotic Boundary Conditions in Yang-Mills Theory
Silvester G. A. Borsboom, Hessel B. Posthuma
In Yang-Mills theory on a Euclidean Cauchy surface, the physical gauge group is often taken to be , where consists of boundary-p…
Hochschild cohomology of Lie-Rinehart algebras
Bjarne Kosmeijer, Hessel Posthuma
We compute the Hochschild cohomology of universal enveloping algebras of Lie-Rinehart algebras in terms of the Poisson cohomology of the associated graded quotient algebras. Centra…
Delocalized eta invariants of the signature operator on G-proper manifolds
Paolo Piazza, Hessel Posthuma, Yanli Song +1
Let be a connected, linear real reductive group and let be a cocompact -proper manifold without boundary. We define delocalized eta invariants associated to a -inve…
A note on the equivariant Chern character in Noncommutative Geometry
Bjarne Kosmeijer, Hessel Posthuma
Given a smooth action of a Lie group on a manifold, we give two constructions of the Chern character of an equivariant vector bundle in the cyclic cohomology of the crossed product…