Reference:
Learning Task Grouping and Overlap in Multi-task Learning
Abhishek Kumar, Hal Daume III
ICML 2012
http://icml.cc/2012/papers/690.pdf
http://icml.cc/discuss/2012/690.html
Depends:
L1General
Mark Schmidt
2006
http://www.di.ens.fr/~mschmidt/Software/L1General/L1GeneralExamples.zip
http://www.di.ens.fr/~mschmidt/Software/L1General/L1General.html