Comparison of integrated mass functions computed for the Sheth et al. (2001, blue solid line) and the Tinker et al. (2008, green solid line) fitting function f(σ), in the Planck best-fit cosmology. The green dashed line corresponds to the Tinker mass function with a σ₈ = 0.87 instead of the best-fit value of 0.83. All mass functions are estimated at virial mass and redshift of 0.05.