<<< mml $$\left(\begin{array}{c}U\\ V\end{array}\right)=\left(\begin{array}{c}U\\ V\end{array}\right)$$ >>> native [ EDelimited "(" ")" [ Right (EArray [ AlignCenter ] [ [ [ EIdentifier "U" ] ] , [ [ EIdentifier "V" ] ] ]) ] , ESymbol Rel "=" , EDelimited "(" ")" [ Right (EArray [ AlignCenter ] [ [ [ EIdentifier "U" ] ] , [ [ EIdentifier "V" ] ] ]) ] ]