# Time Flat Surfaces and the Monotonicity of the Spacetime Hawking Mass II

@article{Bray2016TimeFS,
title={Time Flat Surfaces and the Monotonicity of the Spacetime Hawking Mass II},
author={Hubert L. Bray and Jeffrey L. Jauregui and Marc Mars},
journal={Annales Henri Poincar{\'e}},
year={2016},
volume={17},
pages={1457-1475}
}
• Published 13 February 2014
• Mathematics, Physics
• Annales Henri Poincaré
In this sequel paper, we give a shorter, second proof of the monotonicity of the Hawking mass for time flat surfaces under spacelike uniformly area expanding flows in spacetimes that satisfy the dominant energy condition. We also include a third proof which builds on a known formula and describe a class of sufficient conditions of divergence type for the monotonicity of the Hawking mass. These flows of surfaces may have connections to the problem in general relativity of bounding the total mass…
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