The topological inner structure of Chern-Simons tensor current and the world-sheet of strings

Using the decomposition theory of U(1) gauge potential and φ-mapping topological current theory, the authors investigate the topological inner structure of Chern-Simons tensor current. it is prove that the U(1) Chern-Simons tensor current in four-dimensional manifold is just the topological current of creating the string world-sheets. (author)