2 papers
math.DG2025
Sandwich operators and Einstein deformations of compact symmetric spaces related to Jordan algebras
Stuart James Hall, Paul Schwahn, Uwe Semmelmann
We study the deformability of the symmetric Einstein metrics on the spaces and , thereby concluding the problem to s…
math.DG2024
On the Rigidity of
Stuart James Hall
We revisit Koiso's original examples of rigid infinitesimally deformable Einstein metrics. We show how to compute Koiso's obstruction to the integrability of the infinitesimal defo…