I have left Harvard as of July 1, 2008 to take a position at NYU. This website has been cached and left static. Feel free to browse my new website, aka "What the heck is a Clinical Associate Professor?"

04.06.05

Critical Points - are the horizontal tangents enough?

Posted in Math at 7:27 am by leingang

I wrote a notebook called
Critical Points to demonstrate why we need to look at all critical points of a function, not just the points with horizontal tangents, to find local maxima and minima.

04.01.05

PHP 5.0.3 for Mac OS X

Posted in PHP at 7:11 am by leingang

PHP Info Screenshot
I’m reviewing a new book on PHP5 and since they wanted me to check it for technical accuracy. The only problem for me was that I haven’t done actual PHP programming for a while and in fact never used PHP5. I was worried about clobbering old PHP4 installations. Luckily, however, it is a cinch to install, even on a Mac, with apxs. All I had to do was follow
these instructions and I was good to go.

Notice the bunny rabbit instead of the PHP logo; that must have been an April Fool’s prank.