[Tex/LaTex] putting equation references in parentheses in Lyx

cross-referencingequationslyx

I am trying to typeset a Latex document in LyX. My equation references are showing up as "Eq. 1 blah blah". I would like for them to have parentheses around the numbers, i.e. show up as "Eq. (1) blah blah". Additionally, I would like this to be only for equations, i.e. I want to continue having "Fig. 1 blah blah", not "Fig. (1) blah blah".

It seems that there is a similar question that has been asked, but that person wanted parentheses around all references, as clarified by the first comment in the question.

How can I do this for just equations only? Ideally some kind of preamble addition that only parenthesizes the equations while not touching any of the other references (Figs, Tables, etc.)

Best Answer

When you add the cross-reference, set (<reference>) as the Format:

For existing cross-references, right click the cross-reference and select the same format:

Related Solutions

[Tex/LaTex] Putting all cross references in brackets in LyX

If the numbers of all cross-refernces, and not just those to equations, should be encased in round parentheses, you may achieve by inserting the following instructions in your document's preamble.

\AtBeginDocument{\let\origref\ref
   \renewcommand{\ref}[1]{(\origref{#1})}}}

Here's a full MWE (but without screenshot);

\documentclass{article}
\AtBeginDocument{\let\origref\ref
   \renewcommand{\ref}[1]{(\origref{#1})}}
\begin{document}
\begin{equation}\label{eq:pyth} a^2+b^2=c^2 \end{equation}
\begin{figure}\caption{hello}\label{fig:hello}\end{figure}

Here's a cross-reference to equation \ref{eq:pyth}, and here's a 
cross-reference to figure \ref{fig:hello}.
\end{document}

[Tex/LaTex] Local equation numbering inside proofs

You can make temporary redefitions at the beginning and end of environment with the help of hooks provided by the etoolbox package. So a first attempt is:

\documentclass{article}

\usepackage{mathtools,amsthm,etoolbox,cleveref}

\newtheorem{theorem}{Theorem}

\newcounter{equationstore}
\AtBeginEnvironment{proof}{\setcounter{equationstore}{\value{equation}}
\setcounter{equation}{0}\renewcommand{\theequation}{\alph{equation}}}
\AtEndEnvironment{proof}{\setcounter{equation}{\value{equationstore}}}

\begin{document}

\begin{equation}
  \label{eq:one}
  x = 1
\end{equation}

\begin{theorem}
  A theorem.
\end{theorem}

\begin{proof}
  Proof
  \begin{equation}
    \label{eq:p}
    a = b
  \end{equation}
  refers to \eqref{eq:one}, \eqref{eq:two} and \eqref{eq:p} and gives
  \begin{equation}
    \label{eq:q}
    c = d
  \end{equation}
  as required.  Note the cleveref references are \cref{eq:one},
  \cref{eq:two} and \cref{eq:p}.
\end{proof}

\begin{equation}
  \label{eq:two}
  z = 2
\end{equation}
Refer to \eqref{eq:one}, \eqref{eq:two} and \eqref{eq:p}.  Note the
cleveref references are \cref{eq:one}, \cref{eq:two} and \cref{eq:p}.


\end{document}

This needs to be adjusted depending on you equation labelling scheme.

If you are using hyperref you can avoid messages about duplicate labels either by disabling the hypertextnames option or as follows, where the \theHequation is also redefined in a way that includes a unique number for the current proof:

\documentclass{article}

\usepackage{mathtools,amsthm,etoolbox}
\usepackage{hyperref}
\usepackage{cleveref}

\newtheorem{theorem}{Theorem}

\newcounter{equationstore}
\newcounter{proofnum}

\AtBeginEnvironment{proof}{\setcounter{equationstore}{\value{equation}}
\refstepcounter{proofnum}
\setcounter{equation}{0}\renewcommand{\theequation}{\alph{equation}}
\renewcommand{\theHequation}{\arabic{proofnum}.\alph{equation}}}
\AtEndEnvironment{proof}{\setcounter{equation}{\value{equationstore}}}

\begin{document}

\begin{equation}
  \label{eq:one}
  x = 1
\end{equation}

\begin{theorem}
  A theorem.
\end{theorem}

\begin{proof}
  Proof
  \begin{equation}
    \label{eq:p}
    a = b
  \end{equation}
  refers to \eqref{eq:one}, \eqref{eq:two} and \eqref{eq:p} and gives
  \begin{equation}
    \label{eq:q}
    c = d
  \end{equation}
  as required.  Note the cleveref references are \cref{eq:one},
  \cref{eq:two} and \cref{eq:p}.
\end{proof}

\begin{equation}
  \label{eq:two}
  z = 2
\end{equation}
Refer to \eqref{eq:one}, \eqref{eq:two} and \eqref{eq:p}.  Note the
cleveref references are \cref{eq:one}, \cref{eq:two} and \cref{eq:p}.


\end{document}

Best Answer

Related Solutions

[Tex/LaTex] Putting all cross references in brackets in LyX

[Tex/LaTex] Local equation numbering inside proofs

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