Abstract
The contact process and oriented percolation are expected to exhibit the same critical behavior in any dimension. Above their upper critical dimension d c, they exhibit the same critical behavior as the branching process. Assuming existence of the critical exponents, we prove a pair of hyperscaling inequalities which, together with the results of refs. 16 and 18, implies d c=4.
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Sakai, A. Hyperscaling Inequalities for the Contact Process and Oriented Percolation. Journal of Statistical Physics 106, 201–211 (2002). https://doi.org/10.1023/A:1013197011935
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DOI: https://doi.org/10.1023/A:1013197011935