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The mass function of dark halos in a Lambda-dominated cold dark matter (LambdaCDM) universe is investigated. 529 output files from five runs of N-body simulations are analyzed using the friends-of-friends cluster finding algorithm. All the runs use 512³ particles in the box size of 35 h^-1Mpc to 140 h^-1Mpc. Mass of particles for 35 h^-1 Mpc runs is 2. 67 times 10⁷ h^-1 Mₒ₎₋₀ₑ. Because of the high mass resolution of our simulations, the multiplicity function in the low-mass range, where the mass is well below the characteristic mass and \ = \c / \ \ 1. 0, is evaluated in the present work, and is well fitted by the functional form proposed by Sheth & Tormen (ST). However, the maximum value of the multiplicity function from our simulations at \ \ 1 is smaller, and its low mass tail is shallower when compared with the ST multiplicity function.
Yahagi et al. (2004) studied this question.