Extensible negated arrow

Question

Similar to this question, I want to write some text above $\nrightarrow$ . This is what I could do:

\documentclass{article}
\usepackage{mathtools}
\usepackage{amssymb}
\begin{document}
$\nrightarrow$

$\nrightarrow^{\text{Hello}}$

\end{document}

As you can see, the text is not properly aligned.

So, I seek help in putting the text right on top.

Additionally, it would be appreciated to faciliate extending the arrow to fit the text.

score 9 · Accepted Answer · answered Oct 08 '21 at 09:22

9

Maybe something like

\documentclass{article}
\usepackage{amsmath}
\usepackage{graphicx}
\makeatletter
\newcommand{\xnrightarrow}[2][]{%
  \mathrel{%
    \vphantom{\xrightarrow[#1]{#2}}%
    \ooalign{\hidewidth\neg@arrow\hidewidth\cr$\m@th\xrightarrow[#1]{#2}$\cr}%
  }%
}
\newcommand{\neg@arrow}{%
  $\m@th\vcenter{\hbox{%
    \rotatebox[origin=c]{-45}{\scalebox{1.5}[1]{$\m@th\scriptscriptstyle|$}}%
  }}$
}
\makeatother
\begin{document}
\begin{gather}
A\xnrightarrow{\text{hello}}B \
A\xnrightarrow{\text{hello again}}B
\end{gather}
\end{document}

where a negation symbol is superimposed to the standard \xrightarrow. The negation symbol is a fattened bar which is rotated.

answered Oct 08 '21 at 09:22

egreg

1,121,712

remove "maybe" :). assume that he is wanting it, OP would edit the question or comment you about if it wasn't the solution. – NotStanding with GoGotaHome Oct 08 '21 at 10:23
@VScode_fanboy Maybe, "maybe" is just politeness! – hola Oct 08 '21 at 11:28
@VScode_fanboy If nothing better comes along… – egreg Oct 08 '21 at 12:04
@egreg Yeah of course. No need to change it even if it is accepted. EDIT: it IS. – NotStanding with GoGotaHome Oct 08 '21 at 12:56

Roland · Answer 2 · 2021-10-08T03:01:28.480

4

Maybe \substack is an option for you:

\documentclass{article}
\usepackage{amsmath}
\usepackage{mathtools}
\usepackage{amssymb}
\begin{document}
\[
    \substack{Hello\\\nrightarrow}
\]
\end{document}

edited Oct 08 '21 at 03:01

answered Oct 08 '21 at 02:55

Roland

6,655

3

See the word Extensible in the OPs question. This solution does not provide an extensible negated arrow – daleif Oct 08 '21 at 10:05
@daleif Maybe \substack is an option for you: He probably thought that his answer will be helpful if this the only way or no other answer or hope that OP might use this for his solution. But of course this is not an direct-answer, but that's the point of maybe \lorem is an option... – NotStanding with GoGotaHome Oct 08 '21 at 13:00

Extensible negated arrow

2 Answers2