Conformal Gravity

Conformal gravity is a generic name for gravity theories which are invariant under conformal transformations in the Riemannian geometry sense; more accurately, they are invariant under Weyl transformations where is the metric tensor and is a function on spacetime.

Read more about Conformal Gravity:  Weyl-squared Theories, Four Derivative Theories, Conformal Unification To The Standard Model

Famous quotes containing the word gravity:

    Here I sit down to form characters. One I intend to be all goodness; All goodness he is. Another I intend to be all gravity; All gravity he is. Another Lady Gish; All Lady Gish she is. I am all the while absorbed in the character. It is not fair to say—I, identically I, am anywhere, while I keep within the character.
    Samuel Richardson (1689–1761)