LyX ⇒ multiline equation in lyx

[mkbh10]

I am unable to write an equation like shown in the second image from top in Lyx.

I am able to get the style in image 1 but that is through the use of matrix environment. How do I remove the end bracket and increase the spacing between two rows.

[mkbh10]

I read the manual and I got the space between the rows but the bracket part is left. I will keep trying.

[Johannes_B]

Hi, this looks like a simple cases environment.

One example from my test files containing cases:

Code: Select all

\documentclass{article}
\usepackage{mathtools}
\usepackage{empheq}
\usepackage{siunitx}

\begin{document}

	{\itshape f \(V\) f \(A\)}

\mathtoolsset{mathic=true}
	{\itshape f \(V\) f \(A\)}

		\emph{		test \SI{7}{\meter} ma}\par
		\textsc{		test \SI{7}{\meter} ma}\par
		\textsl{		test \SI{7}{\meter} ma}\par
		\textsf{		test \SI{7}{\meter} ma}\par
	\begin{gather}
		\begin{cases} 
			c & d \\
			d & \SI{7}{\meter}
		\end{cases}\\
		\begin{cases*} 
			c & d \\
			d & \SI{7}{\meter}
		\end{cases*}\\
		a \ordinarycolon\vcentcolon=b
	\end{gather}

	$\displaystyle\sum_{\mathclap{1\le i \le o\le a }}$\par
	$\displaystyle\sum_{\mathllap{1\le i \le o\le a }}$\par
	$\displaystyle\sum_{\mathrlap{1\le i \le o\le a }}$\par

\end{document}