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In GR, is 'Static' the same as 'Time-symmetric'?
I recently attended a talk where the person stated a uniqueness result for static vacuum spacetimes whereby he came to a conclusion about a type of spacetime (a 4-manifold) by studying 3-manifolds ...
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Difference continous - discrete symmetry
I am trying to understand the difference between the two types of symmetries.Wiki
Wikipedia says that
Translation in time : $t \rightarrow t + a$
is a $\textbf{continuous}$ symmetry, for any real $...
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