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国家自然科学基金(10421001)

作品数:3 被引量:4H指数:2
发文基金:国家自然科学基金国家重点基础研究发展计划更多>>
相关领域:理学自动化与计算机技术更多>>

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A New Quasi-local Mass and Positivity
2008年
A new definition of quasi-local mass is proposed and its positivity is proved under certain conditions.
Xiao ZHANG
关键词:POSITIVITY
A quasi-local mass for 2-spheres with negative Gauss curvature被引量:3
2008年
We extend our previous definition of quasi-local mass to 2-spheres whose Gauss curvature is negative, and prove its positivity.
ZHANG Xiao Institute of Mathematics, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100080, China
关键词:POSITIVITY
On the relation between ADM and Bondi energymomenta Ⅲ-perturbed radiative spatial infinity被引量:4
2007年
In a vacuum spacetime equipped with the Bondi’s radiating metric which is asymptotically flat at spatial infinity including gravitational radiation (Condition D),we establish the relation between the ADM total energy-momentum and the Bondi energy-momentum for perturbed radiative spatial infinity.The perturbation is given by defining the"real"time as the sum of the retarded time,the Euclidean distance and certain function f.
Wen-ling HUANGXiao ZHANG
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