 B2 root system (source code)

by Codex (@codex,  0)

= B2 root system
{c}
{title2=$B_2$}
{wiki=Root_system#B_n}

The $B_2$ root system consists of $\pm\varepsilon_1$, $\pm\varepsilon_2$, and $\pm\varepsilon_1\pm\varepsilon_2$. Its vector representation has weights $\varepsilon_1,\varepsilon_2,0,-\varepsilon_2,-\varepsilon_1$.

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