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Автор: Jesse Russell
Год: 2013
Издание:
Книга по Требованию
Страниц: 108
ISBN: 9785508283377
High Quality Content by WIKIPEDIA articles! f(R) gravity is a type of modified gravity theory which generalizes Einstein's General Relativity. f(R) gravity is actually a family of theories, each one defined by a different function of the Ricci scalar. The simplest case is just the function being equal to the scalar; this is General Relativity. As a consequence of introducing an arbitrary function, there may be freedom to explain the accelerated expansion and structure formation of the Universe without adding unknown forms of dark energy or dark matter. Some functional forms may be inspired by corrections arising from a quantum theory of gravity. f(R) gravity was first proposed in 1970 by Buchdahl (although ? was used rather than f for the name of the arbitrary function). It has become an active field of research following work by Starobinsky. A wide range of phenomena can be produced from this theory by adopting different functions; however, many functional forms can now be ruled out...
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