Motivated by problems arising in the applied sciences, I will tell the story
of what might reasonably be called a "forgotten function". It was discovered
in the late 1800s, but has hardly ever been used in the physical sciences even
though, as I will show, its applications in science and engineering turn out
to be many and varied.
In particular, I will survey a new theoretical approach to solving problems in what mathematicians call "multiply connected" domains.