In the third chapter we start with the Poincare group and construct various unitary representations in suitable Hilbert spaces. 第三章我们从庞加莱群着手构造合适的希尔伯特空间的多种幺正表象。
Indeed, as for the big picture, people cannot solve the Poincare conjecture without Dr.Yau's support and his assembly of talented students' fundamental work. 确实，如果纵观全局，没有丘博士的支持与他号召他有才智的学生所做的基础性的工作，人们是不可能解决庞加莱猜想的。
