Abstract
A general approach for finding exact cosmological solutions inf(R) gravity is discussed. Instead of taking into account phenomenological models, we assume, asa physical criterion, the existence of Noether symmetries in the cosmologicalf(R) Lagrangian. As a result, the presence of such symmetries leads to the selection of viablemodels and allows us to solve the equations of motion. We discuss also the case inwhich no Noether charge is present but general criteria can be used to achievesolutions.
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