Math & Science ⇒ Placement of "comma"/"point" between 2 lines of equations

[juk80]

Hi everybody,

I use the following code to define math operations, here a group operation.

Code: Select all

Code, edit and compile here:

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%preamble: centers content in an alignat cell, instead of left/right alignment 
\newcommand*\centermathcell[1]{\omit\hfil$\displaystyle#1$\hfil\ignorespaces}
% usage in text: definition of a binary operation with subequation label on each line 
\begin{subequations}
\begin{alignat}{5}
    & \circ  && \ :\quad && \centermathcell{G \times G } && \centermathcell{\quad\to\quad}     && G\\
    &        &&          && \centermathcell{(g, h)}      && \centermathcell{\quad\mapsto\quad} && g \circ h := \circ(g, h)
\end{alignat}
\end{subequations}
 
 
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Run LaTeX here

I like the style, but sometimes I need a "comma" or a "point" at the end of the definition (somehow between the 2 lines) in order to integrate it with the text flow (see pic attached, highlighted in yellow).
Can anyone help me with the placement of the "comma"/"point" at the end of the definition and still have the sub equation labels on each line.

Thx in advance.

Kind regards,
Jens

[MjK]

Please always try to make a minimal working example instead of showing only a code snippet.

To place the comma between the line, you could add a \raisebox after the longest line:

Code: Select all

Code, edit and compile here:

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\documentclass{article}
\usepackage{amsmath}
\newcommand*\centermathcell[1]{\omit\hfil$\displaystyle#1$\hfil\ignorespaces}
\begin{document}
\begin{subequations}
\begin{alignat}{5}
    & \circ  && \ :\quad && \centermathcell{G \times G } && \centermathcell{\quad\to\quad}     && G\\
    &        &&          && \centermathcell{(g, h)}      && \centermathcell{\quad\mapsto\quad} && g \circ h := \circ(g, h)\smash{\text{\quad\raisebox{.5\baselineskip}{,}}}
\end{alignat}
\end{subequations}
\end{document}
 
 
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Run LaTeX here

However, I would not add the comma centered, but just at the end of the last line:

Code: Select all

Code, edit and compile here:

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\documentclass{article}
\usepackage{amsmath}
\newcommand*\centermathcell[1]{\omit\hfil$\displaystyle#1$\hfil\ignorespaces}
\begin{document}
\begin{subequations}
\begin{alignat}{5}
    & \circ  && \ :\quad && \centermathcell{G \times G } && \centermathcell{\quad\to\quad}     && G\\
    &        &&          && \centermathcell{(g, h)}      && \centermathcell{\quad\mapsto\quad} && g \circ h := \circ(g, h)\text{\enskip,}
\end{alignat}
\end{subequations}
\end{document}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Run LaTeX here

[juk80]

Thx MjK, this will work.
You are, of course, right about the minimal working example - duly noted!