A new geometric invariant on initial data for the Einstein equations.
نویسنده
چکیده
For a given asymptotically flat initial data set for Einstein equations a new geometric invariant is constructed. This invariant measures the departure of the data set from the stationary regime; it vanishes if and only if the data are stationary. In vacuum, it can be interpreted as a measure of the total amount of radiation contained in the data.
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عنوان ژورنال:
- Physical review letters
دوره 93 23 شماره
صفحات -
تاریخ انتشار 2004