Name: Ling-Wei Luo
 Institution: Department of Physics
 Title: Determining the Free Parameters in Viable f(R) Models
 Key Words: f(R) theories
 Abstract: We use experimental constraints to determine the free parameters in viable f(R) models, such as (i) Hu-Sawicki's model (ii) Starobinsky's model and (iii) Linder's exponential gravity.