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Jun 30, 2013 at 6:25 answer added higgsss timeline score: 1
Jun 29, 2013 at 17:31 comment added user8817 4-trace is invariant, but 3-trace is not invariant.
Jun 29, 2013 at 17:26 comment added FraSchelle I don;t really understand your question, but isn't the trace of a tensor an invariant ?
Jun 29, 2013 at 17:06 history edited user8817 CC BY-SA 3.0
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Jun 29, 2013 at 16:56 history asked user8817 CC BY-SA 3.0