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。

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By using the fixed point theorem, we prove some new existence theorems of the solution for this class of nonlinear projection equations in Hilbert Spaces.

利用不动点定理，我们得到了关于这类非线性投影方程解的一些新的存在性定理。

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By using the fixed point theorem, we prove some new existence theorems of the solution for this class of nonlinear projection equations in Hilbert Spaces.

利用不动点定理，我们得到了关于这类非线性投影方程解的一些新的存在性定理。

youdao