2 papers
math.KT2026
Uniformly elliptic boundary value problems
Matti Lyko
We study boundary conditions for elliptic operators on non-compact manifolds with boundary via uniform K-homology, a version of K-homology sensitive to the large-scale geometry of…
math.DG2024
Pseudo-Riemannian symmetric spaces of signature (2,2)
Ines Kath, Matti Lyko
We study all four-dimensional simply-connected indecomposable non-semisimple pseudo-Riemannian symmetric spaces whose metric has signature (2,2). We present models and compute thei…