A correlation inequality is any of a number of inequalities satisfied by the correlation functions of a model. Such inequalities are of particular use in statistical mechanics and in percolation theory. Examples include:
Bell's inequality FKG inequality Griffiths inequality, and its generalisation, the Ginibre inequality Gaussian correlation inequality
References
External links Fishburn, P. C. (2001) [1994], "Correlation inequalities", Encyclopedia of Mathematics, EMS Press