Introduction to gauge theories

Summary form only given. The following subjects were illustrated: flavour chiral symmetry for quarks and leptons; extending a global into a local symmetry: the basic structure of a Yang-Mills theory; the search for the weak interaction group from earlier data: SU(2)(X)U(1); spontaneous symmetry breaking and the masses of W, Z, and the fermions; grand unification: the case of SU(5); and proton instability, neutrino and neutron oscillations. (7 refs).