No fast food for solving higher curvature gravity

TL;DR

This paper clarifies that the effective action method is invalid for higher curvature gravity when using a single function metric ansatz, referencing prior literature.

Contribution

It highlights the known limitation of the effective action approach in higher curvature gravity with a single function metric ansatz, confirming previous results.

Findings

Effective action method invalidates for single function metric ansatz

Prior literature already established this limitation

No new results due to paper withdrawal

Abstract

This paper is withdrawn because it was already known in the literature that the single function metric ansatz invalidates the effective action method. (Refs: gr-qc/0306114, gr-qc/0408067,gr-qc/0404120, gr-qc/0506014, 0705.1669, thanks to S. Deser for providing the information.)