[Tex/LaTex] phantom and parentheses in multiline equation

bracketsequations

When I have a multiline equation enclosed by parentheses, that I want to split, why is the brackets command inside the phantom one, not recognised by the right bracket command? For example, if I have

\begin{equation}
    \begin{split}
        A  = & \left( a + B + \right. \\
             & \phantom{\left(} + c + d \right)
    \end{split}
\end{equation}

I get an error, but if I just use left. instead of \phantom{left(}, everything is fine (I'm trying to make some space to simulate the parentheses)

Best Answer

There are \big, \Big, \bigg, and \Bigg:

\begin{equation}
    \begin{split}
        A  = {} & \Big( \frac{a}{3} + B + {} \\
               &  + c + d \Big)
    \end{split}
\end{equation}

enter image description here

Related Solutions

[Tex/LaTex] splitting an equation inside curly brackets onto 2 lines without using \Big

You don't need \left and \right; your input has several mistakes, by the way: for instance \split{equation} means nothing (and it will produce errors). Also “mean” should be treated as an operator. I don't think the parentheses () around the set are useful.

With split you can choose the alignment point; here's a possibility:

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{equation}
\begin{split}
  X_{t} = \operatorname{mean}(\{\,
    &\lvert Y_{t-4} - Z_{t-4}\rvert,\dots,\\
    &\lvert Y_{t+4} - Z_{t+4}\rvert\,\})
\end{split}
\end{equation}
\end{document}

enter image description here

[Tex/LaTex] List of equations, including equation contents and caption

Since you want a cheat sheet, I'd recommend the extract package. With a slightly different MWE:

\documentclass{article}
\usepackage[
  active,
  header=false,
  copydocumentclass=true,
  generate=\jobname-Cheatsheet,
  extract-env={equation},
  extract-cmdline={synopsis},
  ]{extract} % http://ctan.org/pkg/extract
\begin{extract*}
% Items executed in both the main and extracted document
% (extract manual, section 5.1)
\usepackage{amsmath}
\end{extract*}
\begin{extract}
% Items executed only in extracted document
\def\synopsis#1{#1}
\end{extract}
\def\synopsis#1{}
\begin{document}
First Euler observed that
\synopsis{Euler's equation tying together the five fundamental constants of mathematics}%
\begin{equation}
1 + e^{i \Pi} = 0.
\end{equation}

Then, Gauss discovered the normal distribution:
\synopsis{Normal distribution}%
\begin{equation}
P(x) = \frac{1}{{\sigma \sqrt {2\pi } }}e^{{{ - \left( {x - \mu } \right)^2 } \mathord{\left/ {\vphantom {{ - \left( {x - \mu } \right)^2 } {2\sigma ^2 }}} \right. \kern-\nulldelimiterspace} {2\sigma ^2 }}}
\end{equation}

Finally, Einstein proclaimed: 
\synopsis{Equivalence of mass and energy}%
\begin{equation}
E = m C^2
\end{equation}
\end{document}

you get an original document of:

enter image description here

and an extracted document of:

\documentclass{article}
% Items executed in both the main and extracted document
% (extract manual, section 5.1)
\usepackage{amsmath}
% Items executed only in extracted document
\def\synopsis#1{#1}

\begin{document}

\synopsis{Euler's equation tying together the five fundamental constants of mathematics}%

\begin{equation}
1 + e^{i \Pi} = 0.
\end{equation}

\synopsis{Normal distribution}%

\begin{equation}
P(x) = \frac{1}{{\sigma \sqrt {2\pi } }}e^{{{ - \left( {x - \mu } \right)^2 } \mathord{\left/ {\vphantom {{ - \left( {x - \mu } \right)^2 } {2\sigma ^2 }}} \right. \kern-\nulldelimiterspace} {2\sigma ^2 }}}
\end{equation}

\synopsis{Equivalence of mass and energy}%

\begin{equation}
E = m C^2
\end{equation}

\end{document}

and:

enter image description here

This also works with your original \caption command.

Best Answer

Related Solutions

[Tex/LaTex] splitting an equation inside curly brackets onto 2 lines without using \Big

[Tex/LaTex] List of equations, including equation contents and caption

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