Starting January 1, Kaare Brandt Petersen is now working in SAS Institute (But thank you for the kind comments and tips on other positions people has emailed).
SAS Institute is the vendor of the statistics- and information management software SAS, started back in 1976 in University of North Carolina. Kaare Brandt Petersen will be working in the Copenhagen office as Business Advisor, advocating the use of SAS and data analysis.
Kaare Brandt Petersen, one of the authors of The Matrix Cookbook, is currently looking for his next job (No, updating the cookbook is not a full time job yet). If you have some good ideas or offers - drop him an email at
kaarebrandt (at) gmail (dot) com
You can look at his resume at his LinkedIn profile or at this old school website
The Matrix Cookbook has passed the magic boundary of half a million downloads since the first release in August 2004. And the cookbook is still the most downloaded document at Department of Informatics and Mathematical Modelling, Technical University of Denmark. Yay.
Thanks to many good contributions, we are now able to provide you with an updated and improved version of The Matrix Cookbook. You can download it from the link to the right as usual …
PS: We have decided to turn off direct comments on the blog because of massive problems with spam - sorry. Please send your comments to “cookbook (at) 2302 (dot) dk”. Thanks!
The Matrix Cookbook has been updated with correction of typos and some minor additions on
We sincerely hope you will benefit from the cookbook and join the community effort by reporting typos and submit suggestions.
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.
We have decided to spice up The Matrix Cookbook website in order to involve the cookbook users more actively in the development. We are still working on layout and functionalities of the website, so please send us your ideas …