"Missing { inserted" in DeclarePairedDelimiter

Asked May 15 '22 at 02:58

Active May 15 '22 at 02:58

Viewed 25 times

MWE:

\documentclass{article}
\usepackage{mathtools}
\DeclarePairedDelimiter{\abs}{\left|}{\right|}
\DeclarePairedDelimiter{\absl}{\lvert}{\rvert}
\begin{document}
    $\abs{\cdot}$
$\absl{\cdot}$

\end{document}

The output is as expected:

However, I have the following error with regard to the usage of \abs:

Missing { inserted. $\abs{\cdot}
Missing { inserted. $\abs{\cdot}
Missing } inserted. $\abs{\cdot}
Missing } inserted. $\abs{\cdot}$

Why? How to prevent this?

asked May 15 '22 at 02:58

Atom

1

It was never stated that you could use \left and \right within DeclarePairedDelimiter, was it? Just use the second definition – user202729 May 15 '22 at 03:29
Does this answer your question? \DeclarePairedDelimiter with \left and \right – user202729 May 15 '22 at 03:32
@user202729 Yes it does answer my question partly. Is there a way I can achieve resizing without going through the rigmarole that egreg uses in their answer, that uses \left|? – Atom May 15 '22 at 03:35
What do you mean? Just copy paste it in – user202729 May 15 '22 at 03:38
Alternatively use this answer https://tex.stackexchange.com/a/23182/250119 , might be easier to understand – user202729 May 15 '22 at 03:38
@StefanPinnow That's what I was looking for! Thanks! – Atom May 15 '22 at 05:05
@Atom but then you lose the benefit of the ams command, and get the poorer horizontal spacing of left-right – David Carlisle May 15 '22 at 11:25

"Missing { inserted" in DeclarePairedDelimiter

0 Answers0