“…Indeed, a few symmetric functions over the Riemann zeros that resemble spectral functions have been well described, mainly I ( [10], [18], [23] chap.II). Zeta functions like (2) have also been considered, but almost solely to establish their meromorphic continuation to the whole a-plane -apart from the earliest occurrence we found: a mention by Guinand [17] (see also [8]) of the series (-Z(sl2, v = 0)) on one side of a functional relation (equation (79) (2) occur within the parabolic components) ; and Matiyasevitch [27] discussed the special values 9n * 2 Z (n, -1 ), (n E N*). Extensions in the style of the Lerch zeta function have also been studied ( [16], [23] chap.VI).…”