From the 1 of 3 linked papers with an AI index.
3 papers
math-ph2026
Global Gauge Symmetries and Spatial Asymptotic Boundary Conditions in Yang-Mills Theory
Silvester G. A. Borsboom, Hessel B. Posthuma
The paper rigorously derives the physical gauge group for Yang‑Mills theory on a Euclidean Cauchy surface, showing how boundary‑preserving transformations arise from the instantane…
math.DG2025
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…
math.DG2025
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…