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Some time ago I wrote a command that I used many times, today I realize that it could be written correctly. in particular, the command is selected as "not in a mathematical environment". I looked for other solutions but I do not like them.

I see writing pleasant, but can this command create problems? could you give me a suggestion to write it correctly? Thank you

\documentclass[a4paper]{article} 

\usepackage[T1]{fontenc} 
\usepackage[italian]{babel}
\usepackage{amsmath}
\usepackage{mwe} 

\usepackage{scalerel}
\newcommand\scale[2]{\vstretch{#1}{\hstretch{#1}{#2}}}
\newcommand\ssp[1]{#1^{\scale{.8}{\scriptstyle{\prime}}}} 
\newcommand\sspp[1]{#1^{\scale{.8}{\scriptstyle{\prime\prime}}}}

\begin{document}

\begin{minipage}[t]{.5\textwidth}
    \begin{align}
    \ssp{z_G}\\
    \sspp{z_{G}}
    \end{align}
\end{minipage}
\begin{minipage}[t]{.5\textwidth}
    \begin{align}
    \ssp{G}\\
    \sspp{G}
    \end{align}
\end{minipage}\\

\end{document}

enter image description here

Antonio
  • 543
  • Wouldn't it be easier just to redefine your math alphabet with smaller scripts, rather than trying to scale each invocation of a script? – Steven B. Segletes Feb 21 '19 at 20:20
  • @Steven I am very inexperienced, could you give me an example? thanks – Antonio Feb 21 '19 at 20:23
  • why not use the standard definitions? \newcommand\ssp[1]{#1'} \newcommand\sspp[1]{#1''} – David Carlisle Feb 21 '19 at 21:17
  • @DavidCarlisle a question of size. using the \scale command I found a nice size for reading and for printing. the problem is certainly the unspecified command in the proper way and the position of the quotes in some conditions – Antonio Feb 22 '19 at 10:32

1 Answers1

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I asked in a comment: "Wouldn't it be easier just to redefine your math alphabet with smaller scripts, rather than trying to scale each invocation of a script?" The OP asked how.

\DeclareMathSizes is the command that you can define math script sizes, etc. Take this basic code and look at the output:

\documentclass{article}
\usepackage{lmodern}
\begin{document}
\centering
\[
z'_G\quad z''_{G_G}\quad G'\quad G''
\]
Inline: $\frac{x}{y}$
\end{document}

enter image description here

Now (I'm not sure I am setting all the parameters correctly), compare:

\documentclass{article}
\usepackage{lmodern}
\makeatletter
\DeclareMathSizes{\@xpt}{\@xpt}{5}{4}
\DeclareMathSizes{\@xipt}{\@xipt}{6}{5}
\DeclareMathSizes{\@xiipt}{\@xiipt}{6}{5}
\DeclareMathSizes{\@xivpt}{\@xivpt}{\@xpt}{6}
\makeatother
\begin{document}
\centering
\[
z'_G\quad z''_{G_G}\quad G'\quad G''
\]
Inline: $\frac{x}{y}$
\end{document}

enter image description here

The script sizes are smaller. Also, the lmodern package allows for the rendering of the very small math sizes, so you will need that.

Steven B. Segletes
  • 237,551