Comment on ``Perturbative Method to solve fourth-order Gravity Field Equations"
Abstract
We reconsider the cosmic string perturbative solution to the classical fourth-order gravity field equations, obtained in Ref.CLA94, and we obtain that static, cylindricaly symmetric gauge cosmic strings, with constant energy density, can contain only β-terms in the first order corrections to the interior gravitational field, while the exact exterior solution is a conical spacetime with deficit angle D=8πμ.
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