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SIAMMAX
2010
145views more  SIAMMAX 2010»
14 years 9 months ago
Adaptive First-Order Methods for General Sparse Inverse Covariance Selection
In this paper, we consider estimating sparse inverse covariance of a Gaussian graphical model whose conditional independence is assumed to be partially known. Similarly as in [5],...
Zhaosong Lu
149
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SIAMIS
2010
283views more  SIAMIS 2010»
14 years 9 months ago
A General Framework for a Class of First Order Primal-Dual Algorithms for Convex Optimization in Imaging Science
We generalize the primal-dual hybrid gradient (PDHG) algorithm proposed by Zhu and Chan in [M. Zhu, and T. F. Chan, An Efficient Primal-Dual Hybrid Gradient Algorithm for Total Var...
Ernie Esser, Xiaoqun Zhang, Tony F. Chan
85
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AMC
2008
70views more  AMC 2008»
15 years 2 months ago
Positive solutions to a generalized second order three-point boundary value problem
Ruixi Liang, Jun Peng, Jianhua Shen