A formula I want to typeset contains a tripple line integral, i.e. a symbol that has three integral signs that are encircled. How can I do this?
I tried \oiiint, but that does not work. \iiint works on the contrary.
The mathdesign package defines \oiiint, as do txfonts and pxfonts packages, according to the comprehensive symbols list.
mathdesignpackage yet. – Martin Scharrer Mar 14 '11 at 17:39