User talk:Fcastillo

Welcome!
Hello, and welcome to Wikipedia from SqueakBox! Thank you for your contributions. I hope you like the place and decide to stay. Here are a few good links for newcomers: I hope you enjoy editing here and becoming a Wikipedian! Please sign your name on talk pages using four tildes (~&#126;); this will automatically produce your name and the date. If you need help, check out Questions, ask me on my talk page, or place  on your talk page and someone will show up shortly to answer your questions. Again, welcome, SqueakBox 20:08, 29 June 2007 (UTC)
 * The five pillars of Wikipedia
 * How to edit a page
 * Help pages
 * Tutorial
 * How to write a great article
 * Manual of Style

covariance matrix
Hi. Thanks for your message. The result follows directly from the definition of covariance matrix; the proof is trivial. Hope this helps, Robinh (talk) 19:51, 7 July 2010 (UTC)