%0 Journal Article %T Infinite paths and cliques in random graphs %A A. Berarducci %A P. Majer %A M. Novaga %J Mathematics %D 2008 %I arXiv %X We study some percolation problems on the complete graph over $\mathbf N$. In particular, we give sharp sufficient conditions for the existence of (finite or infinite) cliques and paths in a random subgraph. No specific assumption on the probability, such as independency, is made. The main tools are a topological version of Ramsey theory, exchangeability theory and elementary ergodic theory. %U http://arxiv.org/abs/0809.2335v5