We are happy to announce that The Matrix Cookbook has been updated for a September 2007 version. This version includes new material on topics like the Schur complement, Cramers rule, othorgonal matrices, matrix- and vector norms, etc. Also a few errors has been corrected.
The Matrix Cookbook has now passed to 70K mark. That is, since the announcement of the first version in 2004, The Matrix Cookbook has been downloaded by users all over the world more than 70,000 times. That makes the document the most downloaded document in history, at the institute “Informatics and Mathematical Modelling”, Technical University of Denmark.
Al though, in all fairness, it should be said that some of these hits are the same people downloading it more than once, it is true that The Matrix Cookbook has become a success in many branches of science from quantum mechanics, to econometrics and neurocomputations. We, the proud authors, are wishing all users the best of luck with the matrix computations around the world.