We study the evolution of spatial curvature for thawing class of dark energy models. We examine the evolution of the equation of state parameter, w ? , as a function of the scale factor a , for the case in which the scalar field ? evolve in nearly flat scalar potential. We show that all such models provide the corresponding approximate analytical expressions for w ? ( Ω ? , Ω k ) and w ? ( a ) . We present observational constraints on these models.
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