On the Effect of Relaxation in the Convergence and Quality of Statistical Image Reconstruction for Emission Tomography Using Block-Iterative Algorithms. - Elias Salomão Helou Neto; Alvaro R. De Pierro (SIBGRAPI, 2005)

From convex feasibility to convex constrained optimization using block action projection methods and underrelaxation. - Alvaro R. De Pierro; Elias Salomão Helou Neto (Int. Trans. Oper. Res., 2009)

Incremental Subgradients for Constrained Convex Optimization: A Unified Framework and New Methods. - Elias Salomão Helou Neto; Alvaro R. De Pierro (SIAM J. Optim., 2009)

Incremental algorithms with applications to computerized tomography. - Elias Salomão Helou Neto (2009)

Mesh-Free Discrete Laplace-Beltrami Operator. - Fabiano Petronetto; Afonso Paiva 001; Elias S. Helou; David E. Stewart; Luis Gustavo Nonato (Comput. Graph. Forum, 2013)

String-Averaging Expectation-Maximization for Maximum Likelihood Estimation in Emission Tomography. - Elias Salomão Helou Neto; Yair Censor; Tai-Been Chen; I-Liang Chern; Alvaro R. De Pierro; Ming Jiang 001; Henry Horng-Shing Lu (CoRR, 2014)

Similarity Preserving Snippet-Based Visualization of Web Search Results. - Erick Gomez Nieto; Frizzi San Roman; Paulo A. Pagliosa; Wallace Casaca; Elias S. Helou; Maria Cristina Ferreira de Oliveira; Luis Gustavo Nonato (IEEE Trans. Vis. Comput. Graph., 2014)

Accelerating the over-relaxed iterative shrinkage-thresholding algorithms with fast and exact line search for high resolution tomographic image reconstruction. - Marcelo Victor Wüst Zibetti; Elias S. Helou; Eduardo X. Miqueles; Alvaro R. De Pierro (ICIP, 2015)

Image Restoration Using Gradient Iteration and Constraints for Band Extrapolation. - Moacir Ponti; Elias S. Helou; Paulo Jorge S. G. Ferreira; Nelson D. A. Mascarenhas (IEEE J. Sel. Top. Signal Process., 2016)

On the differentiability check in gradient sampling methods. - Elias Salomão Helou; Sandra A. Santos 001; Lucas E. A. Simões (Optim. Methods Softw., 2016)

On the Local Convergence Analysis of the Gradient Sampling Method for Finite Max-Functions. - Elias Salomão Helou; Sandra A. Santos 001; Lucas E. A. Simões (J. Optim. Theory Appl., 2017)

Accelerating Overrelaxed and Monotone Fast Iterative Shrinkage-Thresholding Algorithms With Line Search for Sparse Reconstructions. - Marcelo Victor Wüst Zibetti; Elias S. Helou; Daniel R. Pipa (IEEE Trans. Image Process., 2017)

A fast gradient and function sampling method for finite-max functions. - Elias Salomão Helou; Sandra A. Santos 001; Lucas E. A. Simões (Comput. Optim. Appl., 2018)

A Backprojection Slice Theorem for Tomographic Reconstruction. - Eduardo X. Miqueles; Nikolay A. Koshev; Elias S. Helou (IEEE Trans. Image Process., 2018)

The Discrete Fourier Transform for Golden Angle Linogram Sampling. - Elias S. Helou; Marcelo V. W. Zibetti; Leon Axel; Kai Tobias Block; Ravinder R. Regatte; Gabor T. Herman (CoRR, 2019)

String-averaging incremental stochastic subgradient algorithms. - R. M. Oliveira; Elias S. Helou; Eduardo F. Costa (Optim. Methods Softw., 2019)

Monotone FISTA With Variable Acceleration for Compressed Sensing Magnetic Resonance Imaging. - Marcelo Victor Wüst Zibetti; Elias Salomão Helou; Ravinder R. Regatte; Gabor T. Herman (IEEE Trans. Computational Imaging, 2019)

Fast Proximal Gradient Methods for Nonsmooth Convex Optimization for Tomographic Image Reconstruction. - Elias S. Helou; Marcelo V. W. Zibetti; Gabor T. Herman (CoRR, 2020)

Analysis of a New Sequential Optimality Condition Applied to Mathematical Programs with Equilibrium Constraints. - Elias S. Helou; Sandra A. Santos 001; Lucas E. A. Simões (J. Optim. Theory Appl., 2020)

A New Sequential Optimality Condition for Constrained Nonsmooth Optimization. - Elias S. Helou; Sandra A. Santos 001; Lucas E. A. Simões (SIAM J. Optim., 2020)

Unbiased Bregman-Risk Estimators: Application to Regularization Parameter Selection in Tomographic Image Reconstruction. - Elias S. Helou; Sandra A. Santos 001; Lucas E. A. Simões (CoRR, 2021)

Derivative-free superiorization: principle and algorithm. - Yair Censor; Edgar Garduño; Elias S. Helou; Gabor T. Herman (Numer. Algorithms, 2021)

A scalable method for the estimation of spatial disaggregation models. - Arthur Nicolaus Fendrich; Elias Salomão Helou Neto; Lucas Esperancini Moreira e Moreira; Durval Dourado Neto (Comput. Geosci., 2022)

A Markovian Incremental Stochastic Subgradient Algorithm. - Rafael Massambone; Eduardo Fontoura Costa; Elias Salomão Helou (IEEE Trans. Autom. Control., 2023)

A primal nonsmooth reformulation for bilevel optimization problems. - Elias S. Helou; Sandra A. Santos 001; Lucas E. A. Simões (Math. Program., 2023)