# Template:Oiint

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This template is used to include the double closed integral, usually in a mathematical formula. It overcomes a limitation of the TeX rendering which cannot display this symbol without clumsy workarounds.

## Arguments

• preintegral the text or formula immediately before the integral
• intsubscpt the subscript below the integral
• integrand the text or formula immediately after the formula

All parameters are optional.

## Examples

Two of Maxwell's equations, e.g. the Maxwell–Faraday equation and Ampère's circuital law (with Maxwell's addition).
:{{oiint
| preintegral = $\oint_C \bold{E} \cdot {\rm d} \boldsymbol{\ell} = \frac{\partial }{\partial t}$
| intsubscpt = ${\scriptstyle S}$
| integrand = $\bold{B} \cdot {\rm d}\bold{S}$
}}

${\displaystyle \oint _{C}{\mathbf {E}}\cdot {\rm {d}}{\boldsymbol {\ell }}={\frac {\partial }{\partial t}}}$ ${\displaystyle {\scriptstyle S}}$ ${\displaystyle {\mathbf {B}}\cdot {\rm {d}}{\mathbf {S}}}$
:{{oiint
| preintegral = $\oint_C \bold{B} \cdot {\rm d} \boldsymbol{\ell} = \mu_0$
| intsubscpt = ${\scriptstyle S}$
| integrand = $\left ( \bold{J} + \epsilon_0\frac{\partial \bold{E}}{\partial t} \right )\! \cdot {\rm d}\bold{S}$
}}

${\displaystyle \oint _{C}{\mathbf {B}}\cdot {\rm {d}}{\boldsymbol {\ell }}=\mu _{0}}$ ${\displaystyle {\scriptstyle S}}$ ${\displaystyle \left({\mathbf {J} }+\epsilon _{0}{\frac {\partial {\mathbf {E} }}{\partial t}}\right)\!\cdot {\rm {d}}{\mathbf {S} }}$

## Technical details

The \oiint command is not part of AMS-LaTeX, and thus not part of the math support that MediaWiki provides. It is available as a unicode character U+222F but font support for this character can be lacking. For this reason, the template provides an image variant of the character.