Tadashi Ashikaga (Tohoku-Gakuin University)

Title: Universal degeneration of Riemann surfaces and fibered complex surfaces

Abstract: We construct the universal degenerating family of Riemann surfaces so that any fibered complex surface can be pulled back from this family. This result may be considered as an extension of the Kodaira's basic member of elliptic surfaces to higher genus fibrations. This is a joint work with Y. Matsumoto.