Four Dimensional Conformal C-spaces
نویسندگان
چکیده
We investigate the structure of conformal C-spaces, a class of Riemmanian man-ifolds which naturally arises as a conformal generalisation of the Einstein condition. A basic question is when such a structure is closed, or equivalently locally conformally Cotton. In dimension 4 we obtain a full answer to this question and also investigate the incidence of the Bach condition on this class of metrics. This is related to earlier results obtained in the Einstein-Weyl context.
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