Bug 55086 - it is impossible to typeset an overlapping overbrace and underbrace pair
Summary: it is impossible to typeset an overlapping overbrace and underbrace pair
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Formula Editor (show other bugs)
Version:
(earliest affected)
unspecified
Hardware: Other All
: medium enhancement
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks: Formula-Editor
  Show dependency treegraph
 
Reported: 2012-09-19 09:35 UTC by Andras Timar
Modified: 2017-09-02 22:15 UTC (History)
0 users

See Also:
Crash report or crash signature:


Attachments
scanned image of the formula (9.93 KB, image/jpeg)
2012-09-19 09:35 UTC, Andras Timar
Details
Screenshot showing formula and rendering in v4.1.3.2. (15.74 KB, image/png)
2013-11-13 03:28 UTC, Owen Genat (retired)
Details

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Description Andras Timar 2012-09-19 09:35:51 UTC
Created attachment 67370 [details]
scanned image of the formula

It is impossible to typeset the attached formula in Math, while it is possible in LaTeX:

\documentclass[12pt]{article}
\usepackage{amsmath}
\begin{document}
\[
  \rlap{$\overbrace{\phantom{a+b}}^x$}a
     +\underbrace{b+c}_y
\]
\end{document}

The formatting command like \rlap is missing from Math.
Comment 1 Owen Genat (retired) 2013-11-13 03:28:28 UTC
Created attachment 89113 [details]
Screenshot showing formula and rendering in v4.1.3.2.

I am confirming this bug. Status set to NEW. There remains no elegant way to typeset the indicate formula in Math. Attached is a screenshot (taken under Crunchbang 11 linux running v4.1.3.2) showing an inelegant workaround, but the line spacing remains too great. Formula in the screenshot:

stack { 
alignl { { phantom { a "+" b } } overbrace x } #
a "+" b "+" c # 
alignr { { phantom { b "+" c } } underbrace y } 
}
Comment 2 Owen Genat (retired) 2014-03-15 23:03:14 UTC
Summary edited for clarity.