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math.DG2026
Boundary flexibility for curvature conditions
Helge Frerichs
We prove a general boundary gluing principle for families of Riemannian metrics with pointwise curvature restrictions on manifolds with possibly non-compact boundary. This includes…
math.DG2024
Scalar curvature deformations with non-compact boundaries
Helge Frerichs
We develop a general deformation principle for families of Riemannian metrics on smooth manifolds with possibly non-compact boundary, preserving lower scalar curvature bounds. The…