Green function | Graph of a function | Hash function | Schur function | Riemann zeta function | Dirac delta function | Bessel function | Spearman's rank correlation coefficient | Pearson product-moment correlation coefficient | Monotonic function | Lateralization of brain function | function (mathematics) | Cryptographic hash function | Linear function | hash function | Gaussian function | function | Euler's totient function | Domain of unknown function | continuous function | Wave function | Quadratic function | Pearson's correlation coefficient r | Meijer G-function | Massieu function | Lyapunov function | Lambert W function | Gamma function | Function block diagram | Feigenbaum function |
In statistical mechanics the Ornstein–Zernike equation (named after Leonard Ornstein and Frits Zernike) is an integral equation for defining the direct correlation function.