9

If you do know, which package do I need to use? Thanks.

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4 Answers 4

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With the MnSymbol package, you could use the following symbols:

\documentclass{article}

\usepackage{MnSymbol}

\begin{document}

\[
\rcirclerightint
\lcirclerightint
\rcircleleftint
\lcircleleftint
\]

\end{document}

enter image description here

(other package might know these symbols as \ointclockwise and \ointctrclockwise)

If you only want half a circle, you can use the mathdesign package:

\documentclass{article}

\usepackage[charter]{mathdesign}

\begin{document}

\[
\intclockwise
\]

\end{document}

enter image description here

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  • Thanks for the reply. But if you search unicode 0x2231, you will see that there is only half a circle drawn. I need that one.
    – trnavac
    Nov 26, 2018 at 16:49
  • 3
    @trckojr If you want a particular shape of a symbol, it would be best if you would include an image of the symbol in your question and don't trust that search machines will return the same result you see for all people
    – samcarter_is_at_topanswers.xyz
    Nov 26, 2018 at 16:53
  • The second answer from you solved my problem. Thank you very much. I will make sure to include an image next time I have a similar problem.
    – trnavac
    Nov 27, 2018 at 18:20
13 
\documentclass{standalone}
\usepackage{array,esint}
\def\CMD#1{%
   $ \csname#1\endcsname \displaystyle\csname#1\endcsname $ & \texttt{\textbackslash#1} &}

\begin{document}
\def\arraystretch{2}
\begin{tabular}{@{}*{2}{r@{\kern3pt}l}r@{\kern3pt}l@{}l@{}}
\CMD{int}   \CMD{iint}     \CMD{iiintop} \\
\CMD{iiiintop}\CMD{dotsintop}\CMD{ointop}  \\
\CMD{oiint}   \CMD{sqint}    \CMD{sqiint} \\
\CMD{ointctrclockwise} \CMD{ointclockwise} \CMD{varointclockwise} \\
\CMD{varointctrclockwise} \CMD{fint} \CMD{varoiint}\\
\CMD{landupint} \CMD{landdownint}
\end{tabular}
\end{document}

enter image description here

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6

Although some of the symbols in esint come very close, I don't believe there is any package (for pdfLaTeX) that provides a version of this symbol compatible with the computer modern maths font.

The following is a (very simple) adaption of this answer by Heiko Oberdiek. It can be used to superimpose any symbol on top of an integral sign.

\documentclass{article}

\usepackage{graphicx} %% <- for \resizebox and \rotatebox
\usepackage{amsmath}
\usepackage{amssymb} %% <- for \curverightarrow, \curveleftarrow

\makeatletter %% <- make @ usable in macro names

\let\DOTSI\relax % amsmath support for \dots
\newcommand*{\letteronint}[1]{%
  \DOTSI
  \mathop{%
    \mathpalette\@LetterOnInt{#1}%
  }%
  \mkern-\thinmuskip % thin space is inserted between two \mathop
  \int
}
\newcommand*{\@LetterOnInt}[2]{%
  \sbox0{$#1\int\m@th$}%
  \sbox2{$%
    \ifx#1\displaystyle
      \textstyle
    \else
      \scriptscriptstyle
    \fi
    #2%
  \m@th$}%
  \dimen@=.4\dimexpr\ht0+\dp0\relax
  \ifdim\dimexpr\ht2+\dp2\relax>\dimen@
    \sbox2{\resizebox*{!}{\dimen@}{\unhcopy2}}%
  \fi
  \dimen@=\wd0 %
  \ifdim\wd2>\dimen@
    \dimen@=\wd2 %
  \fi
  \rlap{\hbox to \dimen@{\hfil
    $#1\vcenter{\copy2}\m@th$%
  \hfil}}%
  \ifdim\dimen@>\wd0 %
    \kern.5\dimexpr\dimen@-\wd0\relax
  \fi
}

%% Define arrow curving downwards:
\newcommand*{\curvearrowbotright}{\mathpalette\rotmath@internal\curvearrowleft}
\newcommand*\rotmath@internal[2]{\rotatebox{180}{$\m@th#1#2$}}

\makeatother %% <- revert @

\newcommand*{\intcw}{\letteronint{\mspace{3mu}\curvearrowright}}
\newcommand*{\intccw}{\letteronint{\mspace{3mu}\curvearrowbotright}}


\begin{document}

\[
  \displaystyle      \intcw_a^b f \dots \intccw_a^b f \qquad
  \textstyle         \intcw_a^b f \dots \intccw_a^b f \qquad
  \scriptstyle       \intcw_a^b f \dots \intccw_a^b f \qquad
  \scriptscriptstyle \intcw_a^b f \dots \intccw_a^b f
\]

\end{document}

output

The \scriptscriptstyle version does not look good, but you probably won't want to use this symbol at that scale.

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2 
\documentclass[varwidth, preview]{standalone}
\usepackage{unicode-math}

\begin{document}
\( \intclockwise \awint \)
\end{document}

Clockwise and counterclockwise integrals

The symbols are also in a number of legacy NFSS packages, including: fdsymbol, newpxmath, newtxmath, pxfonts, txfonts, stix and stix2. Some also support other aliases, but all have been updated to understand \intclockwise and \awint.

Some of these also include variants, such as \intclockwiseup and \smallintclockwise in stix. These are available in unicode-math as stylistic variants in some math fonts.

See “The Comptehensive LaTeX Symbol List” and “Every symbol (most symbols) defined by unicode-math.”

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