## May 31, 2009

### Musical Interlude

Here’s a sample of some of the music that’s getting heavy roation on my iPod, these days.

Posted by distler at 1:27 PM | Permalink | Followups (2)

## May 26, 2009

The Adams operations in K-theory are supposed to be defined by three properties

1. $\psi_k: K(X)\to K(X)$ is a ring-homomorphism.
2. $\psi_k\circ \psi_l = \psi_{l k}$.
3. Acting on a line bundle, $L$, $\psi_k(L) = L^{k}$.

Between that, and the splitting principle, one is supposed to be able to crank them out, explicitly, whenever one needs them.

That’s a pain.

Posted by distler at 12:00 AM | Permalink | Followups (6)

## May 25, 2009

### α to Ω

There’s been much fanfare about the debut of Wolfram α. While it’s impressive, on a technical level, I think Harvey Ω yields consistently more useful search results.

To each his own.

Posted by distler at 8:37 AM | Permalink | Followups (3)