An epidemic analysis of cluster growth on the rhomb form of the Penrose lat
tice yields the site percolation threshold p(c) = 0.58391 +/- 0.00001. The
corrections-to-scaling exponent Omega approximate to 0.7 is consistent with
the value 0.77 +/- 0.02 found here for the square lattice and triangular l
attices. (C) 1999 Elsevier Science B.V. All rights reserved.