Welcome to SPP 2026
This is the platform of a coordinated research programme in mathematics, funded by the German Research Foundation (DFG). It comprises 80 research projects in the fields of differential geometry, geometric topology, and global analysis. More than 80 researchers from doctoral to professorial level and based at more than 20 German and Swiss universities are represented in this programme.
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Latest publications
Towards the boundary of the fine curve graph
Jonathan Bowden, Sebastian Hensel and Richard Webb
The fine curve graph was introduced as a geometric tool to study the homeomorphisms of surfaces. In this paper we study the Gromov boundary of this…
Equidistribution of cusp points of Hecke triangle groups
Laura Breitkopf, Marc Kesseböhmer, Anke Pohl
In the framework of infinite ergodic theory, we derive equidistribution results for suitable weighted sequences of cusp points of Hecke triangle…
First-order elliptic boundary value problems on manifolds with non-compact boundary
Christian Bär, Lashi Bandara
We consider first-order elliptic differential operators acting on vector bundles over smooth manifolds with smooth boundary, which is permitted to be…
A lower bound for the volumes of modular link complements
Connie On Yu Hui, Dionne Ibarra, José Andrés Rodríguez Migueles
Every finite collection of oriented closed geodesics in the modular surface has a canonically associated link in its unit tangent bundle coming from…