2 problems

Let $K(a,M)$ be a Kerr spacetime with $0\leq |a|\leq M$, and let vacuum initial data sets be sufficiently close to Kerr initial data. Stability of Kerr conjecture. Their maximal de…

Let $(\mathcal M,g)$ be extremal Kerr spacetime with mass $M$ and angular momentum per unit mass $a$, where $M=|a|\neq 0$. Let $\phi$ be an axisymmetric solution of … arising from…