# Connectivity properties of Mandelbrot's percolation process

- Received:

DOI: 10.1007/BF00319291

- Cite this article as:
- Chayes, J.T., Chayes, L. & Durrett, R. Probab. Th. Rel. Fields (1988) 77: 307. doi:10.1007/BF00319291

## Summary

In 1974, Mandelbrot introduced a process in [0, 1]^{2} which he called “canonical curdling” and later used in this book(s) on fractals to generate self-similar random sets with Hausdorff dimension *D*∈(0,2). In this paper we will study the connectivity or “percolation” properties of these sets, proving all of the claims he made in Sect. 23 of the “Fractal Geometry of Nature” and a new one that he did not anticipate: There is a probability *p*_{c}∈(0,1) so that if *p*<*p*_{c} then the set is “duslike” i.e., the largest connected component is a point, whereas if *p*≧*p*_{c} (notice the =) opposing sides are connected with positive probability and furthermore if we tile the plane with independent copies of the system then there is with probability one a unique unbounded connected component which intersects a positive fraction of the tiles. More succinctly put the system has a first order phase transition.