X iv : c on d - m at / 9 50 50 19 v 1 4 M ay 1 99 5 Critical behavior for mixed site - bond
نویسندگان
چکیده
We study mixed site-bond directed percolation on 2D and 3D lattices by using time-dependent simulations. Our results are compared with rigorous bounds recently obtained by Liggett and by Katori and Tsukahara. The critical fractions p c site and p c bond of sites and bonds are extremely well approximated by a relationship reported earlier for isotropic percolation, (log p c site / log p c * site + log p c bond / log p c * bond = 1), where p c * site and p c * bond are the critical fractions in pure site and bond directed percolation.
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