2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/199033We show that the process of renormalization encapsules a Hopf algebra structure in a natural manner. This sheds light on the recently proposed connection between knots and renormalization theory.LaTeX, 23pages, uses epsf for 5 Figs., also available via http://dipmza.physik.uni-mainz.de/~kreimer/hopfn.ps, references updatedQuantum AlgebraHigh Energy Physics - Theorytext