I know there is more than one approach in studying strong interaction, a geometric one based on gauge theories and one based on quantum field theory. In both of them I would like to know which topics I have to study in order to understand this theory, for example my knowledge of quantum physics consists in the Schrodinger equation and in its solutions in different situations. I am more interested in the geometric approach, but surely I will not have an all-embracing view until I will know the latter one. I would like to understand in particular the confinement and the asymptotic freedom. Thanks.