Comment on "Number of common sites visited by $N$ random walkers" [PDF]
L. TurbanMajumdar and Tamm [Phys. Rev. E 86 021135 (2012), arXiv:1206.6184] recently obtained analytical expressions for the mean number of common sites W_N(t) visited up to time t by N independent random walkers starting from the origin of a d-dimensional lattice. In this short note I show how the different regimes and the corresponding asymptotic power laws can be retrieved using the notion of fractals intersection.View original: http://arxiv.org/abs/1209.2527
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