The AROMATH seminar will usually happen on Tuesday at 10h30-11h30 every two weeks, except for a few deviations.
The presentations will typically take place at Inria Sophia Antipolis, Byron Blanc 106, and also online.
To join online, at https://cutt.ly/aromath or with a web browser at https://cutt.ly/aromath-web
use meeting ID: 828 5859 7791, passcode: 123
Paul Catala - A low-rank solver for off-the-grid Wasserstein group-Lasso
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12 May 2020
Tuesday 12 May, 11h(FR)=12h(GR) at https://meet.jit.si/Aromath
Paul Catala (DMA ENS Paris)
A low-rank solver for off-the-grid Wasserstein group-Lasso We consider the problem of simultaneously recovering pointwise sources across several similar tasks given some low-pass measurements. The group Lasso regularizes this problem by enforcing a common sparse support to the solutions in each task, which is often too restrictive in real applications. In this talk, I will introduce a new off-the-grid (i.e. without spatial discretization) solver for this multi-task recovery, which integrates a Wasserstein distance between the recovered sources. This solver uses a semidefinite programming relaxation based on Lasserre's hierarchy. Extension to the recovery of non-sparse objects will be discussed.
