12 search results - page 1 / 3 » On the Uniqueness of Nonnegative Sparse Solutions to Underde... |
TIT
2008
13 years 4 months ago
2008
An underdetermined linear system of equations Ax = b with non-negativity constraint x 0 is considered. It is shown that for matrices A with a row-span intersecting the positive o...
SIAMSC
2008
13 years 4 months ago
2008
Abstract. In this paper, we empirically investigate the NP-hard problem of finding sparsest solutions to linear equation systems, i.e., solutions with as few nonzeros as possible. ...
CORR
2010
Springer
13 years 3 months ago
2010
Springer
Abstract--This paper investigates the uniqueness of a nonnegative vector solution and the uniqueness of a positive semidefinite matrix solution to underdetermined linear systems. A...
ICA
2007
Springer
13 years 11 months ago
2007
Springer
Abstract. In this paper, a new algorithm for source recovery in underdetermined Sparse Component Analysis (SCA) or atomic decomposition on over-complete dictionaries is presented i...
TSP
2008
13 years 4 months ago
2008
Abstract-- The FOCal Underdetermined System Solver (FOCUSS) algorithm has already found many applications in signal processing and data analysis, whereas the regularized MFOCUSS al...