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A review on algebraic extensions in general relativity
Author(s) -
Hess Peter O.
Publication year - 2021
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.202113990
Subject(s) - physics , general relativity , algebraic number , neutron star , extension (predicate logic) , redshift , black hole (networking) , theory of relativity , einstein , gravitation , limit (mathematics) , metric (unit) , theoretical physics , astrophysics , mathematical physics , classical mechanics , mathematics , mathematical analysis , computer science , galaxy , computer network , routing protocol , operations management , routing (electronic design automation) , link state routing protocol , economics , programming language
A brief review on algebraic extensions of general relativity is presented. After a short summary of first attempts by Max Born and Albert Einstein, all possible algebraic extensions will be discussed, with the pseudo‐complex (pc) extension left as the only viable one, because it does not contain ghost solutions. Also some metric extensions are presented, such as the non‐symmetric gravitation theory and the Finsler metric. Some predictions of the pc extension are discussed, such as the structure of light emission of an accretion disk around a black hole, the redshift at the surface of a compact star as a function in the azimuthal angle, and whether there is an upper limit for the mass of a neutron star.