Some articles on gravity, theory:
... Theories of gravity can be classified, loosely, into several categories ... of action) a Lagrangian density a metric If a theory has a Lagrangian density for gravity, say, then the gravitational part of the action is the integral of that In this equation it is usual, though not ... Almost every theory described in this article has an action ...
Famous quotes containing the words gravity and/or theory:
“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 sayI, identically I, am anywhere, while I keep within the character.”
—Samuel Richardson (16891761)
“every subjective phenomenon is essentially connected with a single point of view, and it seems inevitable that an objective, physical theory will abandon that point of view.”
—Thomas Nagel (b. 1938)