30.10.2025, 16:15
						 –  Building 9, Room 1.22, Golm
						
Forschungsseminar Differentialgeometrie
					
					(Some) scalar curvature rigid submersions are Riemannian products
Oskar Riedler
Max Lewandowski
We start by discussing under which circumstances a fundamental solution can be restricted to a spacelike Cauchy hypersurface so that the corresponding Cauchy problem is well-posed which will demand some basic microlocal analysis. For the resulting solution we can derive Green's operators and, assuming the wave operator to be formally self-adjoint, prove certain properties of the fundamental solution.