Cotton Gravity and Conformal Killing Gravity are shown to admit generalized Vaidya solutions with extra geometric r-squared and r-cubed terms, but several displayed formulas have internal inconsistencies.
Farewell to Cotton gravity
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We reformulate our proof of the under-determination of Cotton gravity in terms of the Codazzi parametrization.
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Generalized Vaidya Spacetime in Cotton and Conformal Killing Theories
Cotton Gravity and Conformal Killing Gravity are shown to admit generalized Vaidya solutions with extra geometric r-squared and r-cubed terms, but several displayed formulas have internal inconsistencies.