2

I'm trying to make a double integral, but, somewhy, the sign appears small compared to regular integral signs, does anybody knows why? And how do I solve this? I am using the 'equation' environment

  • 2
    give an example. – user2478 Dec 10 '15 at 18:33
  • 1
    Are you looking for \iint available in amsmath package? – Sunilkumar KS Dec 10 '15 at 18:41
3

Package amsmath

\documentclass{article}
\usepackage{amsmath}

\begin{document}
\[
  \int \iint
\]
\end{document}

Result \iint of package amsmath

The size is the same, maybe, you want to use this.

Package wasysym

\documentclass{article}
\usepackage{wasysym}

\begin{document}
\[
  \int \iint
\]
\end{document}

Result \iint of package wasysym

Package wasysym does not provide the larger more slanted form. However, the standard integral can be redefined to match the double integral:

\documentclass{article}
\usepackage[integrals]{wasysym}

\begin{document}
\[
  \int \iint
\]
\end{document}

Result of option integrals of package wasysym

Other

There are lots of other packages, which provide the double integral, but most of them also change the appearance of other symbols (mathabx, txfonts, ...). See The Comprehensive LaTeX Symbol List.

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