F(R) gravity
THEORY OF GRAVITY WHOSE LAGRANGIAN IS SOME FUNCTION OF THE RICCI SCALAR R
F(R)-gravity; F(R) theory; F(r) gravity; F (R) gravity theories; F(R) gravity theories
() is a type of modified gravity theory which generalizes Einstein's general relativity. () gravity is actually a family of theories, each one defined by a different function, , of the Ricci scalar, .