How to make the distance between two rows larger in array?

Question

I found a mathematical formula in mathdesign document, it looks good and elegant

When I try to type it as it looks, what I got is always not as good as origin.

The code I use is

\begin{equation}\label{test}
\newcolumntype{Y}{>\displaystyle c}
  \left|\frac{D(u,v)}{D(x,y)}\right|=
  \left|
  \begin{array}{@{}YY@{}}
    \frac{\partial u}{\partial x} & \frac{\partial u}{\partial y} \\
    \frac{\partial v}{\partial x} & \frac{\partial v}{\partial y}
  \end{array}
  \right|
  \neq
  0
  \quad
  \text{and}
  \quad
  \left|\frac{D(x,y)}{D(u,v)}\right|=
  \left|
  \begin{array}{@{}YY@{}}
    \frac{\partial x}{\partial u} & \frac{\partial x}{\partial v} \\
    \frac{\partial y}{\partial u} & \frac{\partial y}{\partial v}
  \end{array}
  \right|
  \neq
  0
\end{equation}

which produces

I think the distance between two rows are too narrow. How can I can get the result as origin? Thanks :)

Answer 1

You can specify the distance between the rows by adding the optional argument to the newline command as in: \\[2.5ex]

\documentclass{article}
\usepackage{amsmath,amssymb}
\usepackage{array}
\pagestyle{empty}
\begin{document}
\begin{equation}\label{test}
\newcolumntype{Y}{>\displaystyle c}
  \left|\frac{D(u,v)}{D(x,y)}\right|=
  \left|
  \begin{array}{@{}YY@{}}
    \frac{\partial u}{\partial x} & \frac{\partial u}{\partial y} \\[2.5ex]
    \frac{\partial v}{\partial x} & \frac{\partial v}{\partial y}
  \end{array}
  \right|
  \neq
  0
  \quad
  \text{and}
  \quad
  \left|\frac{D(x,y)}{D(u,v)}\right|=
  \left|
  \begin{array}{@{}YY@{}}
    \frac{\partial x}{\partial u} & \frac{\partial x}{\partial v} \\[2.5ex]
    \frac{\partial y}{\partial u} & \frac{\partial y}{\partial v}
  \end{array}
  \right|
  \neq
  0
\end{equation}

\end{document}