Mimetic Horava Gravity and Surface terms

Abstract

We consider mimetic Horava gravity, where the scalar field of mimetic gravity was used in the construction of diffeomorphism invariant models reducing to Horava gravity in the synchronous gauge. It will be shown that the surface terms resulting from the variation of the action constructed will cancel out; therefore, there is no need for the addition of Gibbons-Hawking-York boundary term. The resulting surface terms contain higher order space derivatives and no higher order time derivativesComment: 9 page