Mass and angular-momentum inequalities for axi-symmetric initial data sets. II. Angular-momentum
arXiv:0712.4064 · doi:10.1016/j.aop.2007.12.011
Abstract
We extend the validity of Dain's angular-momentum inequality to maximal, asymptotically flat, initial data sets on a simply connected manifold with several asymptotically flat ends which are invariant under a U(1) action and which admit a twist potential.
added Appendix C on uniqueness