Archive for June 6th, 2007

Using PDFs on GNU/Linux

June 6, 2007

Here is a nice piece about using PDFs on GNU/Linux; I learnt about pdftk thanks to Deep; the stuff about PDFedit is new to me though. Take a look!

Some quaternion resources!

June 6, 2007
  1. Here are a couple of recent bibliographies of quaternions in mathematical physics — alphabetical and analytical;
  2. A nearly six month old bibliography on the net; and,
  3. From Gutenberg: A primer of quaternions by Arthur Hathaway (1896) and Vector analysis and quaternions of Alexander Macfarlane (1906).

The wiki page on quaternions is a good resource too.