A while ago, I was searching for a TeX package which would provide a double integral symbol with a circle which I could use to typeset some lecture notes on surface integrals. I happened upon the esint package, which includes several integral symbols I had never seen before. In particular, integral symbols with a square (
\sqiint), a sloped dash (
\fint) and the very curious
\landdownint. Is anyone familiar with any uses for these symbols?
Added (TB) Here's an image of the integral signs in question: