https://doi.org/10.1140/epjc/s10052-022-10079-5
Regular Article - Theoretical Physics
On the “Einstein–Gauss–Bonnet gravity in four dimension”
1
Peng Huanwu Center for Fundamental Theory, 230026, Hefei, Anhui, China
2
Interdisciplinary Center for Theoretical Study and Department of Modern Physics, University of Science and Technology of China, 230026, Hefei, Anhui, China
Received:
21
November
2021
Accepted:
29
January
2022
Published online:
9
February
2022
To ensure the existence of a well defined linearized gravitational wave equation, we show that the spacetimes in the so-called “Einstein–Gauss–Bonnet gravity in four dimension” have to be locally conformally flat.
© The Author(s) 2022
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