## Mounting NFS in OSX Lion

A common problem in connecting NFS on OS X machines is that, they do not connect on “reserved ports” (i.e. $$&lt;$$1024). Two ways to solve: On the NFS server, use “insecure” keyword in the /etc/exports to accept so-called insecure ports for connection. Or in OS X side, instruct to use... [more]

## Balls and Bins

Assume there are $$m$$ balls and $$n$$ bins. We denote $$\eta_{i}^b$$ the event that ball $$i$$ falls into bin $$b$$, and denote $$\epsilon_{ij}$$ the event that balls $$i$$ and $$j$$ collide. [more]