Surface Integral

TwistedOne151 · #1 $Old$ December 9th, 2007, 05:20 PM

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 ∯ to work).

--Kevin C.

ThePerfectHacker · #2 $Old$ December 9th, 2007, 05:33 PM

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,
$\oint \oint$

Krizalid · #3 $Old$ December 9th, 2007, 06:14 PM

Here some nice symbols:

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

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

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

$\mathop{\int\mkern-20.8mu \circlearrowright}$