}$ for kernel and such that its Laplace transform satisfies $$\begin{aligned} &&\mathbb{E} \Biggl[ \exp\Biggl\{-{0\over0} \sum _{j = 0}^{0}\lambda_j \psi _{\sigma }(j) \Biggr\} \Biggr] \\ &&\qquad = \mathbb{E} \Biggl[{ \exp