2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47934The role of various symmetries in the evaluation of splitting functions and coefficient functions is discussed. The scale invariance in hard processes is known to be a guiding tool to understand the dynamics. We discuss the constraints on splitting functions coming from various symmetries such as scale, conformal and supersymmetry. We also discuss the Drell-Levy-Yan relation among splitting and coefficient functions in various schemes. The relations coming from conformal symmetry are also presented.9 pages Latex + 1 style file all compressed by uufilesHigh Energy Physics - Phenomenologytext