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- W1815448736 abstract "We propose a linear time and constant space algorithm for computing Euclidean projections onto sets on which a normalized sparseness measure attains a constant value. These non-convex target sets can be characterized as intersections of a simplex and a hypersphere. Some previous methods required the vector to be projected to be sorted, resulting in at least quasilinear time complexity and linear space complexity. We improve on this by adaptation of a linear time algorithm for projecting onto simplexes. In conclusion, we propose an efficient algorithm for computing the product of the gradient of the projection with an arbitrary vector." @default.
- W1815448736 created "2016-06-24" @default.
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- W1815448736 date "2013-03-21" @default.
- W1815448736 modified "2023-09-27" @default.
- W1815448736 title "Efficient Sparseness-Enforcing Projections" @default.
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