On Lipschitz Inversion of Nonlinear Redundant Representations
On Lipschitz Inversion of Nonlinear Redundant Representations
复制标题
非线性冗余表示的Lipschitz反演
DOI:
10.1090/conm/650/13030
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Dongmian Zou
中科院分区:
文献类型:
--
作者:
R. Balan;Dongmian Zou
In this note we show that reconstruction from magnitudes of frame coefficients (the so called “phase retrieval problem”) can be performed using Lipschitz continuous maps. Specifically we show that when the nonlinear analysis map α : H → Rm is injective, with (α(x))k = |〈x, fk〉|, where {f1, · · · , fm} is a frame for the Hilbert space H, then there exists a left inverse map ω : Rm → H that is Lipschitz continuous. Additionally we obtain that the Lipschitz constant of this inverse map is at most 12 divided by the lower Lipschitz constant of α.