# Surface Integral

• Dec 9th 2007, 03:20 PM
TwistedOne151
Surface Integral
Is there a way to use the (closed) surface integral character, unicode 222F, in LaTeX? (I've tried just entering the character here in the text of this post, so you can see clearly which one I mean, but can't get &#x222F; to work).

--Kevin C.
• Dec 9th 2007, 03:33 PM
ThePerfectHacker
It is supposed to be \ooint or maybe \oiint but these do not work.
This possibly has to do with the fact that the closed suface integral is not used by mathematicians only used by physicists. No I am totally serious, I never seen a math book use a closed surface integral, while physics book (especially on electromagnetism) just use them all the time.

You can just write,
$\displaystyle \oint \oint$
• Dec 9th 2007, 04:14 PM
Krizalid
Here some nice symbols:

$\displaystyle \mathop{{\int\!\!\!\!\!\int}\mkern-21mu \bigcirc}$

$\displaystyle \mathop{{\int\!\!\!\!\!\int\!\!\!\!\!\int}\mkern-31.2mu \bigodot}$

$\displaystyle \mathop{\int\mkern-20.8mu \circlearrowleft}$

$\displaystyle \mathop{\int\mkern-20.8mu \circlearrowright}$
• Dec 12th 2007, 05:04 AM
shilz222
Krizalid is like the LaTeX god.
• Dec 12th 2007, 10:39 AM
ThePerfectHacker
Quote:

Originally Posted by shilz222
Krizalid is like the LaTeX god.

Krizalid is the LaTeX god, but I am the Math god.

This is Mine 81:):)th Post!!!
• Sep 29th 2009, 02:10 AM
battle-monk
This character is defined in "wasysym" package.
If you need the character you can use the wasysym package; it is defined there as \oiint.
Good luck (Happy)