中文摘要：

研究从连通复流形M到辛群Sp（N）多重调和映射，将调和映射的结论推广到多重调和映射上，证明了到辛群的多重调和映射的极小辛-uniton数不大于N，而极小uniton数不大于2N-1．

英文摘要：

This paper studies the pluriharmonic maps from a connected complex manifold M into a symplectic group Sp（N）. Some results on harmonic maps are generalized to pluriharmonic maps. It is proved that the minimal symplectic uniton number of φ is not larger than N, and the minimal uniton number of φ is not larger than 2N - 1.