quaternion grassmann manifold meaning in English

四元数格拉斯曼流形

Its content may be separated into two parts . the first part contains chapter one and chapter two , which treat of the harmonic maps from surface into symplectic groups and quaternion grassmann manifolds . the second part contains chapter three and chapter four , which treat of local isometric immersions from space forms or riemannian products of space forms into space forms
全文分四章，内容可分为两部分：第一部分包括第一、二章，主要论涉从曲面到辛群及四元grassmann流形的调和映射；第二部分包括第三、四章，主要论涉从空间形式或空间形式的局部riemann积到空间形式的局部等距浸入。