1

In the scope of gaining space, I would like my superscript minuses to be shortened from:

$ J^{-1} $

to

$ J^{\text -1} $

using a rule.

  • What do you mean by "using a rule"? – user156344 Mar 27 at 9:37
  • @JouleV I believe a hyphen is meant.@Dash: What's the question? – campa Mar 27 at 9:38
  • Sorry but I don’t quite understand. You wanna shorten a short sequence of characters to a long sequence? – L. F. Mar 27 at 9:39
  • What I mean by a rule is that I don't want a solution that consists in putting "\text" in every brackets like I did. Instead, I would like a a way to define it globally. In the spirit of defining a "newcommand" perhaps. If you run my code, you'll see that the second proposition has a shorter superscript "-1". It therefore uses less space which is my final goal. I am open to other suggestions. – Dahs Mar 27 at 9:52
  • @Dash DON'T DO THAT!!!. Your readers will be grateful. – user156344 Mar 27 at 9:59
2

I'm not sure that “saving space” at the expense of readability should be pursued.

In the picture, top is the standard, bottom is the “space saving” version.

\documentclass{article}
\usepackage{amsmath,graphicx}

\makeatletter
\DeclareRobustCommand{\shortminus}{\mathbin{\mathpalette\short@minus\relax}}
\newcommand{\short@minus}[2]{%
  \ifx#1\displaystyle
    \std@minus
  \else
    \ifx#1\textstyle
      \std@minus
    \else
      \scalebox{0.5}[1]{$\m@th#1\std@minus$}%
    \fi
  \fi
}
\makeatother

\begingroup\lccode`~=`-\lowercase{\endgroup\let~}\shortminus
\AtBeginDocument{\mathcode`-="8000 }

\begin{document}

$-J^{\csname std@minus\endcsname1}$

$-J^{-1}$

\end{document}

enter image description here

  • I think I will not pursue this idea after all. But thanks for the code anyway, it helps me understanding the "makeatletter/makeatother" stuff. I am surprised you think it looks less readable. Of course the symbol is smaller, but it looks more like the way I (and possibly others) write on paper. The minus symbol is still visible and the reader should think about an "inverse". And because I insisted on the definition of $J^{-1}$ at the beginning of the text. I don't think this should be read from 100 feet using binoculars and I can read it with myopia. Can you develop your comment ? – Dahs Mar 27 at 10:32
  • @Dash If you want that the inverse is denoted differently, it's better to define a command for it, and not monkeying with the minus sign generally. – egreg Mar 27 at 10:52
  • Why are general modifications of such sign a bad idea ? – Dahs Mar 27 at 10:56
  • @Dash Try $a^{m-n}$. – egreg Mar 27 at 10:57

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.