Zdroj TeX:

\small \mathcal R' = \left \langle O'=[ \frac{-1-\sqrt{3}}{2} , \frac{-1+\sqrt{3}}{2}]; \vec e'_1=( \frac{1}{2},-\frac{\sqrt{3}}{2} ), \vec e'_2=(\frac{\sqrt{3}}{2},\frac{1}{2}) \right\rangle