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Consider the flat Robertson-Walker metric: -dt + a(t) [dx + dy + dz] ds = where a(t) is the scale factor. (a) Identify the

Consider the flat Robertson-Walker metric: -dt + a(t) [dx + dy + dz] ds = where a(t) is the scale factor. (a) Identify the Killing vectors associated with spatial translations in the metric. [3 marks]

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