Symmetries and Unification

Abstract

Symmetries concerning the ordinary coordinate spacetime and internal spacetime are discussed. A possible unification model of electroweak, strong and gravitational interactions is briefly described.

Comments: 14 pages, latex, Talk presented in the International Conference on Physics Since Parity Symmetry Breaking (A conference in memory of Madame C.S. Wu) August 16-18, 1997 Nanjing, to appear in the Proceedings