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Connections to the recently developed Nonlinear Primal-Dual Hybrid Gradient Method (NL-PDHGM) are presented, and the algorithm is demonstrated to handle the nonlinear inverse problem of parallel Magnetic Resonance Imaging (MRI).", isbn="978-3-319-55795-3" } @article{beck2012smoothing, title={Smoothing and first order methods: A unified framework}, author={Beck, Amir and Teboulle, Marc}, journal={SIAM Journal on Optimization}, volume={22}, number={2}, pages={557--580}, year={2012}, publisher={SIAM} } @article{combettes2018monotone, title={Monotone Operator Theory in Convex Optimization}, author={Combettes, Patrick L}, journal={arXiv preprint arXiv:1802.02694}, year={2018} } @inproceedings{lin2011linearized, title={Linearized alternating direction method with adaptive penalty for low-rank representation}, author={Lin, Zhouchen and Liu, Risheng and Su, Zhixun}, booktitle={Advances in neural information processing systems}, pages={612--620}, year={2011} } @article{gabay1976dual, title={A dual algorithm for the solution of nonlinear variational problems via finite element approximation}, author={Gabay, Daniel and Mercier, Bertrand}, journal={Computers and Mathematics with Applications}, volume={2}, number={1}, pages={17--40}, year={1976}, publisher={Elsevier} } @article{Gabay83, title={Applications of the method of multipliers to variational inequalities}, author ={D. 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