# Definition:Two-Row Notation/Technical Note

## Technical Note on Two-Row Notation

The $\LaTeX$ code for $\begin{pmatrix} a & b & c & d \\ d & b & c & a \end{pmatrix}$ is \begin{pmatrix} a & b & c & d \\ d & b & c & a \end{pmatrix} .

For a more compact presentation, the code:

\dbinom {a \ b \ c \ d} {d \ b \ c \ a}

can be used, which gives:

$\dbinom {a \ b \ c \ d} {d \ b \ c \ a}$

However, this technique does not work well when the width of the fields is non-uniform:

$\dbinom {m \ l \ l \ m} {m \ m \ l \ l}$