H. Posthuma

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boundary conditions 1 gauge symmetry 1 hamiltonian formalism 1 higgs mechanism 1 yang-mills theory 1

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math.DG2025

Higher Lefschetz formulas on Γ-proper manifolds

Paolo Piazza, Hessel Posthuma, Yanli Song +1

Let $Γ$ 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 $G$ be a connected, linear real reductive group and let $X$ be a cocompact $G$ -proper manifold without boundary. We define delocalized eta invariants associated to a $L^{2}$ -inve…