Abstract
We classify four-dimensional connected simply-connected Lorentzian symmetric spaces M with connected nontrivial isotropy group furnishing solutions of the Einstein–Yang–Mills equations. Those solutions are built with respect to some invariant metric connection \(\Lambda \) in the bundle of orthonormal frames of M and some diagonal metric on the holonomy algebra corresponding to \(\Lambda \).
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Acknowledgements
We are grateful to the referee by his/her valuable observations, which have contributed to improve this paper. We are indebted to Professor G. Calvaruso for the initial work we did on the topic and his recent rewarding suggestions, which have contributed to meliorate the manuscript. Our hearty thanks to Professor A. Elduque for his worthful help on several questions.
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Research supported by the Ministerio de Ciencia, Innovación y Universidades, Spain: M.C.L. and E.R.M. under Project No. PGC2018-098321-B-I00; and P.M.G. under the MINECO-FEDER Grant MTM2016-77093-P.
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Castrillón López, M., Gadea, P.M. & Rosado María, M.E. Lorentzian Symmetric Spaces Which are Einstein–Yang–Mills with Respect to Invariant Metric Connections. Results Math 75, 143 (2020). https://doi.org/10.1007/s00025-020-01259-4
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DOI: https://doi.org/10.1007/s00025-020-01259-4
Keywords
- Lorentzian symmetric spaces
- Einstein–Yang–Mills equations
- Komrakov’s classification of four-codimensional real pairs