On rational maps from a general surface in P3 to surfaces of general type

Abstract

We study the dominant rational maps from a general surface in P3 to surfaces of general type. We prove restrictions on the target surfaces, and special properties of the rational maps. We show that for a small degree the general surface has no such map. Moreover a slight improvement of a result of Catanese, on the number of moduli of a surface of general type, is also obtained.

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