NONLOCAL MODIFIED GRAVITY AND ITS COSMOLOGICAL SOLUTIONS

Abstract

Besides great achievements and many nice properties, general relativity as theory of gravity is not a complete theory. There are many attempts to its modica-tion. One of promising modern approaches towards more complete theory of gravityis its nonlocal modication. We present here a brief review of nonlocal gravity withsome its cosmological solutions. In particular, we pay special attention to two attrac-tive nonlocal models, in which nonlocality is expressed by an analytic function of the d'Alembert operator. In these models, we are mainly interested in nonsingular bounce solutions for the cosmic scale factor.