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I have an equation long enough to occupy two lines. I want to break it to improve readability. How can I break it?
\begin{equation}
F = \{F_{x} \in F_{c} : (|S| > |C|) \cap
(minPixels < |S| < maxPixels) \cap
(|S_{connected}| > |S| - \epsilon)
\}
\end{equation}
I want to break it in 3 lines after \cap. But \\ or \n didn't work.
Use split environment provided by amsmath package.
\begin{equation}
\begin{split}
F = \{F_{x} \in F_{c} &: (|S| > |C|) \\
&\quad \cap (\text{minPixels} < |S| < \text{maxPixels}) \\
&\quad \cap (|S_{\text{conected}}| > |S| - \epsilon) \}
\end{split}
\end{equation}
\mathrm{minPixels} and \mathrm{maxPixels} and \mathrm{connected}.
Jan 14, 2011 at 12:12
\text inherits formatting from the surrounding text (which might be italic in a theorem environment).
\right( and \left) or similar, one should be careful. The \left. and \right. should be used in order to avoid splitting of brackets pairs. For example a line should have the form `\left( \ldots \right. \` when it involves this kind of brackets.
The aligned environment from amsmath is also a good option:
\begin{equation}
\begin{aligned}
F ={} & \{F_{x} \in F_{c} : (|S| > |C|) \\
& \cap (\mathrm{minPixels} < |S| < \mathrm{maxPixels}) \\
& \cap (|S_{\mathrm{conected}}| > |S| - \epsilon)\}
\end{aligned}
\end{equation}
{} works as a math atom to keep the correct spacing around the = symbol, because = is a binary operator just like the + and the - symbols. When you type $-5$ and $x-5$, the first - is a unary operator and is close to the 5, but the second - is a binary operator with larger and equal distances from both x and 5--the same logic holds here.
For simple multi-line equations without alignment, use the multline environment:
\begin{multline}
F = \{F_{x} \in F_{c} : (|S| > |C|) \cap
(minPixels < |S| < maxPixels) \\ \cap
(|S_{conected}| > |S| - \epsilon)
\}
\end{multline}
The mathtools package provides the multlined environment.
\begin{equation}
\begin{multlined}
F = \{F_{x} \in F_{c} : (|S| > |C|) \\
\shoveleft[1cm]{\cap (\mathrm{minPixels} < |S| < \mathrm{maxPixels})} \\
\cap (|S_{\mathrm{connected}}| > |S| - \epsilon) \}
\end{multlined}
\end{equation}
mathtools package (1.17) and it has no such environment. Perhaps it's been removed since you posted your answer.
Nov 7, 2015 at 20:39
multlined (mult without i, i.e. not multilined).
\begin{eqnarray}
F = \{F_{x} \in F_{c} : (|S| > |C|) \cap \nonumber \\
(minPixels < |S| < maxPixels) \cap \nonumber \\
(|S_{conected}| > |S| - \epsilon)
\\}
\end{eqnarray}
eqnarray a bit pointless if no alignment ponts are employed? (The fact eqnarray is badly deprecated is another strike against it.)
amsmath is the preferred way.
Jul 15, 2017 at 13:11
breqnpackage.