Take the 2-minute tour ×
TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. It's 100% free, no registration required.

Is there a macro in latex to write ceil(x) and floor(x) in short form? The long form

\left \lceil{x}\right \rceil 

is a bit lengthy to type every time it is used.

share|improve this question

migrated from stackoverflow.com Jun 7 '13 at 22:41

This question came from our site for professional and enthusiast programmers.

1  
Welcome to TeX.SX! Your post was migrated here from another Stack Exchange site. Please register on this site, too, and make sure that both accounts are associated with each other (by using the same OpenID), otherwise you won't be able to comment on or accept answers or edit your question. –  Joseph Wright Jun 8 '13 at 5:31
    
Thank you, it seems I was asking questions in the wrong forum indeed! –  danny Jul 7 '13 at 17:35

2 Answers 2

up vote 19 down vote accepted

Using \DeclarePairedDelimiter from mathtools, you could define macros \ceil and \floor, which will scale the delimiters properly (if starred):

\documentclass{minimal}
\usepackage{mathtools}
\DeclarePairedDelimiter\ceil{\lceil}{\rceil}
\DeclarePairedDelimiter\floor{\lfloor}{\rfloor}

\begin{document}
  \begin{equation*}
    \floor*{\frac{x}{2}} < \frac{x}{2} < \ceil*{\frac{x}{2}}
  \end{equation*}
\end{document}

Result:

Scaling delimiters with <code>\floor</code> and <code>\ceil</code>

share|improve this answer
2  
That's neat. Didn't know about this command. –  Jan Jun 8 '13 at 11:47
  1. You can define your own macro via the \def command anywhere in your document. For example

    \def\lc{\left\lceil}   
    \def\rc{\right\rceil}
    

    and then just write \lc x \rc.

  2. Or you use the \providecommand in the preamble, e.g.

    \providecommand{\myceil}[1]{\left \lceil #1 \right \rceil }
    

    to simply use \myceil{x} in your document.

  3. Use an editor, like vim, that allows for defining shortcuts for quick and efficient editing.
  4. And, finally, don't forget about readability of your tex document. Check out this thread for some instructive comments on how to write efficient and readable tex math docs.
share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

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