Yep, very cool posts Chintak! Especially the second one where you turn it up to 11! =) And it really shows the power of numpy, beyond what I realised!

On Wed, Jul 31, 2013 at 6:23 AM, Stéfan van der Walt <stefan@sun.ac.za> wrote:
The part about einsum is really nice!  I propose we add a nice comment
in the code (of your PR) to explain what's happening on that einsum
line, because most  people won't have a clue :)

This is definitely true of me! Actually I don't really understand the "real" einsum expression in your blog post, the one doing the SSD computation. Can you explain it in a bit more detail? What's the arrow?

Anyway, good stuff. =)