man-roxygen/deriv_wv/2nd/deriv2_dr.R

In SMAC-Group/simts: Time Series Analysis Tools

#' @section Process Haar WV Second Derivative:
#' Taking the derivative with respect to \eqn{\omega}{omega} yields:
#' \deqn{\frac{{{\partial ^2}}}{{\partial {\omega ^2}}}\nu _j^2\left( \omega  \right) = \frac{{\tau _j^2}}{8}}{d^2/domega^2 nu[j]^2(omega) = tau[j]^2/8}