Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fast off-the-grid sparse recovery with over-parametrized projected
  gradient descent   We consider the problem of recovering off-the-grid spikes from Fourier
measurements. Successful methods such as sliding Frank-Wolfe and continuous
orthogonal matching pursuit (OMP) iteratively add spikes to the solution then
perform a costly (when the number of spikes is large) descent on all parameters
at each iteration. In 2D, it was shown that performing a projected gradient
descent (PGD) from a gridded over-parametrized initialization was faster than
continuous orthogonal matching pursuit. In this paper, we propose an
off-the-grid over-parametrized initialization of the PGD based on OMP that
permits to fully avoid grids and gives faster results in 3D.

24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn