# What does this mean?

1. Aug 5, 2010

2. Aug 5, 2010

### quasar987

Apparently, $\Omega$ is a volume of space and $\partial \Omega$ denote its boundary. For instance, if $\Omega$ is the unit ball, then $\partial \Omega$ is the unit sphere.

3. Aug 5, 2010

Ah thanks