2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/38781We study the possibility to reconstruct the primordial function for some periodic function. The procedure includes an analytical continuation of a discrete function for Fourier coefficients computation, that introduces an ambiguity. To establish conditions under which no ambiguity appears, the modification of Carlson theorem is suggested. In a case when no subsidiary condition is imposed, ambiguity in the definition of primordial function does not go beyond the functions which belong to space $Ω^{\prime}$.High Energy Physics - LatticePrimordial function and ambiguity in its determinationtext