A Russo-Seymour-Welsh (RSW) theorem is established for continuum percolation on $\mathbb{R}^2$. The equality of various definitions of critical densities for the continuum percolation on $\mathbb{R}^2$ is deduced as an application of the RSW theorem. It is also shown that various notions of the size of a cluster yield the same notion of critical density.
@article{1176990632,
author = {Roy, Rahul},
title = {The Russo-Seymour-Welsh Theorem and the Equality of Critical Densities and the "Dual" Critical Densities for Continuum Percolation on $|mathbb{R}^2$},
journal = {Ann. Probab.},
volume = {18},
number = {4},
year = {1990},
pages = { 1563-1575},
language = {en},
url = {http://dml.mathdoc.fr/item/1176990632}
}
Roy, Rahul. The Russo-Seymour-Welsh Theorem and the Equality of Critical Densities and the "Dual" Critical Densities for Continuum Percolation on $|mathbb{R}^2$. Ann. Probab., Tome 18 (1990) no. 4, pp. 1563-1575. http://gdmltest.u-ga.fr/item/1176990632/