3 papers
math.AG2008
Twistor structures, tt*-geometry and singularity theory
Claus Hertling, Christian Sevenheck
We give an overview on the tt*-geometry defined for isolated hypersurface singularities and tame functions via Brieskorn lattices. We discuss nilpotent orbits in this context, as w…
math.AG2003
Rigid and Complete Intersection Lagrangian Singularities
Christian Sevenheck, Duco van Straten
In this article we prove a rigidity theorem for lagrangian singularities by studying the local cohomology of the lagrangian de Rham complex that was introduced in math.AG/0002083.…
math.AG2000
Deformation of singular lagrangian subvarieties
Duco van Straten, Christian Sevenheck
We investigate deformations of lagrangian manifolds with singularities. We introduce a complex similar to the de Rham-complex whose cohomology calculates deformation spaces. Exampl…