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Aktivitäten

04.12.2025, 14:00-15:30  –  2.22
Seminar Geometry and Physics

Static and Stationary Vacuum Extensions Realizing Bartnik Boundary Data: Local Well-Posedness near Schwarzschild Spheres

Ahmed Ellithy

We consider the Bartnik extension problem, which originates from Bartink's definition of quasi-local mass. In this problem, we consider Bartnik boundary data on a topological 2-sphere (induced metric... 

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11.12.2025, 16:15 Uhr  –  Raum 1.22, Haus 9
Forschungsseminar Differentialgeometrie

Hodge Dualities in the Perturbation Setup and Applications:Perturbed Zeta Determinant and Analytic Torsion

Ihsane Malass

We consider the perturbation of the exterior differential by a closed one-form \(a\), \(d_a := d + a \wedge \cdot\), on a manifold with boundary. This gives rise to the perturbed (or twisted) de Rham... 

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18.12.2025, 16:15  –  TBA
Forschungsseminar Differentialgeometrie

TBA

Nadine Große (Freiburg)

TBA

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22.01.2026, 16:15 Uhr  –  TBA
Forschungsseminar Differentialgeometrie

TBA

Koen van den Dungen

TBA

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29.01.2026, 16:15  –  Building 9, Room 1.22 (Joint session with Analysis group)
Forschungsseminar Differentialgeometrie

Equivalence between local and global Hadamard States with Robin boundary conditions on half-Minkowski spacetime

Claudio Dappiaggi (Pavia)

We construct the fundamental solutions and Hadamard states for a Klein-Gordon field in half-Minkowski spacetime with Robin boundary conditions in arbitrary dimensions using a generalisation of the... 

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05.02.2026, 16:15  –  Raum 1.22, Haus 9
Forschungsseminar Differentialgeometrie

TBA (Lockman)

Samuel Lockman (Regensburg)

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Conference in Honour of Christian Bär (19–23 September 2022)

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