section_heading: Kršenje Bellove nejednakosti
paragraph_text: \vec{\sigma} = \begin{bmatrix} \sigma_{x} \\ \sigma_{y} \\ \sigma_{z}   \end{bmatrix} \quad  \sigma_{x} = \begin{bmatrix}  0&1 \\ 1&0 \\ \end{bmatrix} \quad \sigma_{y} = \begin{bmatrix}  0&-i \\ i&0 \\ \end{bmatrix} \quad \sigma_{z} = \begin{bmatrix}  1&0 \\ 0&-1 \\ \end{bmatrix}. </math>