Why is it that the genetic "distance" between two populations would be determined by the angle between their position vectors rather than the magnitude of their respective displacements? [more inside]
posted by PuGZ on Mar 8, 2008 - 10 answers

Is there an easy way to manage extensive amounts of .eps & .ai files (Adobe Illustrator) into a .pdf catalog format? I often buy vector pack cds that come with vast amounts of eps/ai files but there is almost always a single .pdf file that has a catalog of all the files in one for easy browsing. Is there a tool that does this automatically?
posted by cheero on Sep 19, 2007 - 2 answers

Could someone suggest book(s) that deal with tips/tricks/methods of performing mathematical calulations faster. I mean higher mathematics and not just elementary operations like addition/multiplication/finding the root etc. What I am looking for are hints and shortcuts that would help me with stuff like calculus, linear albegra, vectors and such. Thanks!
posted by sk381 on Sep 20, 2006 - 7 answers

Mathematical imbecile question: what's the simplest, most universal way to add a list of vectors? [more inside]
posted by Jimbob on Feb 19, 2005 - 7 answers