which function can be used in a covariance function what is the function for covariance in xs what is the gamma(h) in x-sigma what is the coefficient of covariance? why is the covariance function $c(h) necessary what is the covariance function for the variogram how to find a second order covariance function what does $h$ mean what is the gamma function? where is h value in a gamma function? what is the covariance function in the variable $e in spatial stats what is the function of covariance $c(h) what is the covariance function for e what is the function for gamma(h) in a variogram what is the covariance function of gamma(h) which of the following functions is only a function of distance? what is the definition of covariance function where is the value of gamma (h)$ what is the covariance function for $e what is the covariance function for second-order stationary processes