man-roxygen/deriv_wv/2nd/deriv2_qn.R

In SMAC-Group/gmwm: Generalized Method of Wavelet Moments

#' @section Process Haar WV Second Derivative:
#' Taking the derivative with respect to \eqn{Q^2}{Q^2} yields:
#' \deqn{\frac{{{\partial ^2}}}{{\partial {Q^4}}}\nu _j^2\left( Q^2  \right) = 0 }{d^2/dQ^4 nu[j]^2(Q^2) = 0}