6

My only two packages are amsmath and amsfonts. When I type \leq, it shows up as if I had typed \le. How do I do the actual less-than-equals (>=) sign?

Edit: I typed \leq and the output symbol was >, but I want >=. I am also using the site sharelatex.com as my editor.

I think something was wrong with sharelatex, as when I closed my project and reopened, everything was fine.

tM --
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    \le and \leq produce the same output. – Sigur Jun 01 '14 at 16:46
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    If you want two symbols, a > and a =, type the two characters separately. – marczellm Jun 01 '14 at 16:52
  • Are you maybe thinking of leqslant, in which the equality-side bar is also slanted? – Mico Jun 01 '14 at 16:52
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    Please show a complete (preferably minimal) document that reproduces the issue. – Jukka K. Korpela Jun 01 '14 at 16:53
  • No I'm thinking of one symbol, >=, but I don't have this symbol on my keyboard. It is not slanted. – tM -- Jun 01 '14 at 16:53
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    Nobody writes >= except when nothing else is available, in pure ASCII context such as newsgroups or similar situations. If you can type > and =, then $a>=b$ will do what you want; but it's wrong and ugly. – egreg Jun 01 '14 at 19:11
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    I'm voting to close this question as your comment to the accepted answer indicates that your problem is not related to LaTeX. – cryingshadow Jan 20 '16 at 02:17
  • @user49915 In a programming language, >= could be a keyword by itself, so it's a different case. As are decorations. – egreg Nov 27 '18 at 12:49

4 Answers4

25

\le and \leq are synonyms, as are \ge and \geq:

\documentclass{article}
\usepackage{amsmath,amsfonts}
\begin{document}
\[ a\leq b \le c \]
\[ a\geq b \ge c \]
\end{document}

Result

These symbols are defined in fontmath.ltx, part of the LaTeX kernel:

\DeclareMathSymbol{\leq}{\mathrel}{symbols}{"14}
   \let\le=\leq
\DeclareMathSymbol{\geq}{\mathrel}{symbols}{"15}
   \let\ge=\geq
Heiko Oberdiek
  • 271,626
  • @Sigur I closed and reopened sharelatex and the problem didn't happen anymore. I thought it must have been a sharelatex problem. This answer was very comprehensive and did help me realize it wasn't something about LaTeX I didn't understand (as I'm new with this). – tM -- Jun 02 '14 at 00:09
2

Perhaps another symbol is meant, with a = symbol, stacked under <, which can be obtained with \leqq from MnSymbol package.

enter image description here

\documentclass{article}


\usepackage{MnSymbol}

\begin{document}

\[ \le \] is another symbol than \[ \leqq \]

but means the same mathematical relation. 


\end{document}
2

amssymb provides \leqq and \geqq if you badly need it.

\documentclass{article}
\usepackage{amssymb}
\begin{document}
  \[ a\leqq b \]
  \[ a\geqq b \]
\end{document}

enter image description here

0

First, I think you can use a virtual keyboard on your computer to type >=.

Second, using MnSymbol to type the characters in math mode. This is the sample code.

\documentclass{article}

\usepackage{MnSymbol}

\begin{document}
    \[
        \equal
    \]
    \[
        \gtr
    \]
    \[
        \less
    \]
    \[
        \gtr\equal
    \]
    \[
        \less\equal
    \]
\end{document}

enter image description here

Pattisahusiwa
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