Integrals Integrals 2 $$\begin{array}{|ccc|}\hline \text{Set}& \text{Operation}& \text{Identity}\\ \mathbb{Z}& +& 0\\ \mathbb{Q}& +& 0\\ \mathbb{R}& +& 0\\ \mathbb{Z}& \times & 1\\ \mathbb{Q}& \times & 1\\ \mathbb{R}& \times & 1\\ \hline\end{array}$$ $${\left[\begin{array}{ccc}{u}_{11}& u_{12}& u_{13}\\ u_{21}& u_{22}& u_{23}\\ u_{31}& u_{32}& u_{33}\end{array}\right]}^T</math></code><BR><math>{\left[\begin{array}{ccc}{u}_{11}& u_{12}& u_{13}\\ u_{21}& u_{22}& u_{23}\\ u_{31}& u_{32}& u_{33}\end{array}\right]}^T$$