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The sharp threshold for jigsaw percolation in random graphs

  • Oliver Cooley (a1), Tobias Kapetanopoulos (a2) and Tamás Makai (a3)

Abstract

We analyse the jigsaw percolation process, which may be seen as a measure of whether two graphs on the same vertex set are ‘jointly connected’. Bollobás, Riordan, Slivken, and Smith (2017) proved that, when the two graphs are independent binomial random graphs, whether the jigsaw process percolates undergoes a phase transition when the product of the two probabilities is $\Theta({1}/{(n\ln n)})$ . We show that this threshold is sharp, and that it lies at ${1}/{(4n\ln n)}$ .

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Corresponding author

*Postal address: Institute of Discrete Mathematics, Graz University of Technology, Steyrergasse 30, 8010 Graz, Austria. Email address: cooley@math.tugraz.at Supported by the Austrian Science Fund (FWF) & German Research Foundation (DFG) under grant I3747.
**Postal address: Mathematics Institute, Goethe University, 10 Robert Mayer Street, Frankfurt 60325, Germany. Email address: kapetano@math.uni-frankfurt.de Supported by a Stiftung Polytechnische Gesellschaft PhD grant.
***Postal address: School of Mathematical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS. Email address: t.makai@qmul.ac.uk Supported by the Austrian Science Fund (FWF) under grant P26826 and the EPSRC under grant EP/N004221/1.

References

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The sharp threshold for jigsaw percolation in random graphs

  • Oliver Cooley (a1), Tobias Kapetanopoulos (a2) and Tamás Makai (a3)

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