Update: Dr. Mairal left the Center in August 2012. He is now a Research Assistant, INRIA, France.
Feature selection in directed acyclic graphs. Address problem of predicting the response of neurons from the V4 area of the visual cortex, given a stimuli consisting of a sequence of natural images shown to a subject. Other projects (still preliminary) include - links between sparse recovery bounds in statistics and channel capacity - smooth analysis of the Lasso.