<<< native [ EDelimited "\8968" "\8971" [ Right (EArray [ AlignCenter ] [ [ [ EIdentifier "U" ] ] , [ [ EIdentifier "V" ] ] ]) ] , ESymbol Rel "=" , EDelimited "\8970" "\8969" [ Right (EArray [ AlignCenter ] [ [ [ EIdentifier "U" ] ] , [ [ EIdentifier "V" ] ] ]) ] ] >>> tex \left\lceil \begin{matrix} U \\ V \end{matrix} \right\rfloor = \left\lfloor \begin{matrix} U \\ V \end{matrix} \right\rceil