In the third chapter we start with the Poincare group and construct various unitary representations in suitable Hilbertspaces.
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。
2
By using the fixed point theorem, we prove some new existence theorems of the solution for this class of nonlinear projection equations in HilbertSpaces.